Fix broken links (#173)

* README: fix link to classic.gazebosim.org
* Remove host from gazebosim.org/tutorials links:
  Shorten the start of all Markdown links starting with
  http://gazebosim.org/tutorials to /tutorials

Signed-off-by: Steve Peters <[email protected]>

Author: scpeters

README.md

@@ -1,7 +1,7 @@
 # Gazebo Tutorials #
 
-This repository contains the source for each gazebo tutorial found on [Gazebo Tutorials](http://gazebosim.org/tutorials).
+This repository contains the source for each gazebo tutorial found on [Gazebo Tutorials](http://classic.gazebosim.org/tutorials).
 
 ## Tips for creating tutorials
 
-1. Add images and/or videos where appropriate so that the reader has a reference image to compare their simulation instance against.
+1. Add images and/or videos where appropriate so that the reader has a reference image to compare their simulation instance against.

actor/tutorial.md

@@ -18,7 +18,7 @@ environment.
 # Actors
 
 In Gazebo, an animated model is called an `actor`. Actors extend
-[common models](http://gazebosim.org/tutorials?tut=build_model&cat=build_robot),
+[common models](/tutorials?tut=build_model&cat=build_robot),
 adding animation capabilities.
 
 There are two types of animations which can be used separately or combined
@@ -39,7 +39,7 @@ moves in the world:
     [[file:files/skel_traj_full.gif|300px]]
 
 Gazebo's actors are just like
-[models](http://gazebosim.org/tutorials?tut=build_model),
+[models](/tutorials?tut=build_model),
 so you can put links and joints inside them as usual. The main differences are:
 
 * Actors are always static (i.e. no forces are applied on them, be it from
@@ -180,7 +180,7 @@ fluid motion, but the exact poses contained in the waypoints might not be reache
 
 > **Tip**: Non-actor models can also follow scripted trajectories, but that
 requires the use of plugins. See
-[this](http://gazebosim.org/tutorials?tut=animated_box)
+[this](/tutorials?tut=animated_box)
 tutorial to learn how.
 
 Now it's your turn! Try out different trejctory descriptions before moving on to
@@ -225,7 +225,7 @@ The actor in the example above is really simple, all it loads is a COLLADA file
 described within the `<skin>` tag.
 
 > **Note**: If you've made
-[custom](http://gazebosim.org/tutorials?tut=import_mesh&cat=build_robot)
+[custom](/tutorials?tut=import_mesh&cat=build_robot)
 Gazebo models before, you might have used COLLADA files as visuals and
 collisions for your models. When used within *links*, COLLADA animations are
 ignored, but when used within *skins*, they are loaded!
@@ -236,7 +236,7 @@ The file specified in `<filename>` can be an absolute path, for example:
 
 You can also tell Gazebo to look for the mesh in all the directories contained in
 the environment variable
-[`GAZEBO_MODEL_PATH`](http://gazebosim.org/tutorials?tut=components),
+[`GAZEBO_MODEL_PATH`](/tutorials?tut=components),
 like this:
 
     model://skeketon_model/skeleton.dae
@@ -396,7 +396,7 @@ take a look at an example of how to change the trajectory dinamically using
 plugins.
 
 > **Tip**: If you're not familiar with Gazebo plugins, take a look at some
-[plugin tutorials](http://gazebosim.org/tutorials?cat=write_plugin) first.
+[plugin tutorials](/tutorials?cat=write_plugin) first.
 
 Gazebo has an example world with actors moving around while avoiding obstacles.
 Take a look at it running:

add_laser/tutorial.md

@@ -1,6 +1,6 @@
 # Overview
 
-**Prerequisites:** [Attach a Mesh as Visual](http://gazebosim.org/tutorials/?tut=attach_meshes)
+**Prerequisites:** [Attach a Mesh as Visual](/tutorials/?tut=attach_meshes)
 
 This tutorials demonstrates how the user can create composite models directly
 from other models in the
@@ -75,4 +75,4 @@ Adding a laser to a robot, or any model, is simply a matter of including the sen
 
 ## Next
 
-[Next: Make a Simple Gripper](http://gazebosim.org/tutorials/?tut=simple_gripper)
+[Next: Make a Simple Gripper](/tutorials/?tut=simple_gripper)

add_laser/tutorial_6+.md

@@ -1,6 +1,6 @@
 # Overview
 
-**Prerequisites:** [Attach a Mesh as Visual](http://gazebosim.org/tutorials/?tut=attach_meshes)
+**Prerequisites:** [Attach a Mesh as Visual](/tutorials/?tut=attach_meshes)
 
 This tutorials demonstrates how the user can create composite models directly
 from other models in the
@@ -68,4 +68,4 @@ Adding a laser to a robot, or any model, is simply a matter of including the sen
 
 ## Next
 
-[Next: Make a Simple Gripper](http://gazebosim.org/tutorials/?tut=simple_gripper)
+[Next: Make a Simple Gripper](/tutorials/?tut=simple_gripper)

attach_gripper/tutorial-1.9+.md

@@ -2,9 +2,9 @@
 
 **Prerequisites:**
 
-  [Make a Mobile Robot](http://gazebosim.org/tutorials/?tut=build_robot)
+  [Make a Mobile Robot](/tutorials/?tut=build_robot)
 
-  [Make a Simple Gripper](http://gazebosim.org/tutorials/?tut=simple_gripper)
+  [Make a Simple Gripper](/tutorials/?tut=simple_gripper)
 
 This tutorial explains how to create a composite robot from existing robot parts, i.e. mobile base, simple arm and simple gripper.
 
@@ -14,7 +14,7 @@ Start up gazebo and make sure you can load the models from the two previous tuto
 
 ## Mobile Base
 
-1. Per instructions in [Make a Mobile Robot](http://gazebosim.org/tutorials/?tut=build_robot) tutorial, you should have a mobile base robot at your disposal:
+1. Per instructions in [Make a Mobile Robot](/tutorials/?tut=build_robot) tutorial, you should have a mobile base robot at your disposal:
 
     [[file:files/Mobile_base.png|640px]]
 

attach_gripper/tutorial.md

@@ -2,9 +2,9 @@
 
 **Prerequisites:**
 
-  [Make a Mobile Robot](http://gazebosim.org/tutorials/?tut=build_robot)
+  [Make a Mobile Robot](/tutorials/?tut=build_robot)
 
-  [Make a Simple Gripper](http://gazebosim.org/tutorials/?tut=simple_gripper)
+  [Make a Simple Gripper](/tutorials/?tut=simple_gripper)
 
 This tutorial explains how to create a composite robot from existing robot parts, i.e. mobile base, simple arm and simple gripper.
 
@@ -14,7 +14,7 @@ Start up gazebo and make sure you can load the models from the two previous tuto
 
 ## Mobile Base
 
-1. Per instructions in [Make a Mobile Robot](http://gazebosim.org/tutorials/?tut=build_robot) tutorial, you should have a mobile base robot at your disposal:
+1. Per instructions in [Make a Mobile Robot](/tutorials/?tut=build_robot) tutorial, you should have a mobile base robot at your disposal:
 
     [[file:files/Mobile_base.png|640px]]
 

attach_meshes/tutorial.md

@@ -1,6 +1,6 @@
 # Overview
 
-**Prerequisites:** [Make a mobile robot](http://gazebosim.org/tutorials/?tut=build_robot)
+**Prerequisites:** [Make a mobile robot](/tutorials/?tut=build_robot)
 
 Meshes can add realism to a model both visually and for sensors.  This tutorial demonstrates how the user can use custom meshes to define how their model will appear in simulation.
 
@@ -105,7 +105,7 @@ The most common use case for a mesh is to create a realistic looking visual.
 
 ##Further Reading##
 
-When creating a new robot, you'll likely want to use your own mesh file. The [import a mesh tutorial](http://gazebosim.org/tutorials/?tut=import_mesh) describes how to go about importing a mesh into a format suitable for Gazebo.
+When creating a new robot, you'll likely want to use your own mesh file. The [import a mesh tutorial](/tutorials/?tut=import_mesh) describes how to go about importing a mesh into a format suitable for Gazebo.
 
 ## Try for yourself ##
 
@@ -119,4 +119,4 @@ Note: Materials (texture files such with extension like .png or .jpg), should be
 
 ##Next##
 
-[Next: Add a Sensor to a Robot](http://gazebosim.org/tutorials/?tut=add_laser)
+[Next: Add a Sensor to a Robot](/tutorials/?tut=add_laser)

build_model/tutorial-7.md

@@ -74,4 +74,4 @@ Here is a good order in which to add features:
 1. Add all plugins (if any).
 
 With each new addition, load the model using the graphical client to make sure your model is correct.
-However, the `box.sdf` file alone isn't enough to be able to load the model into the graphical client. You must also setup your model directory correctly, which you will learn in the next tutorial: [Make a Mobile Robot](http://gazebosim.org/tutorials?tut=build_robot&cat=build_robot).
+However, the `box.sdf` file alone isn't enough to be able to load the model into the graphical client. You must also setup your model directory correctly, which you will learn in the next tutorial: [Make a Mobile Robot](/tutorials?tut=build_robot&cat=build_robot).

build_robot/tutorial.md

@@ -4,7 +4,7 @@ The tutorial demonstrates Gazebo's basic model management, and exercises familia
 
 ## Setup your model directory ##
 
-Read through the [Model Database documentation](http://gazebosim.org/tutorials?tut=model_structure&cat=build_robot). You will be creating your own model, which must follow the formatting rules for the Gazebo Model Database directory structure.  Also, for details on model description formats, please refer to the [SDF reference](http://gazebosim.org/sdf).
+Read through the [Model Database documentation](/tutorials?tut=model_structure&cat=build_robot). You will be creating your own model, which must follow the formatting rules for the Gazebo Model Database directory structure.  Also, for details on model description formats, please refer to the [SDF reference](http://gazebosim.org/sdf).
 
 1.  Create a model directory:
 
@@ -110,7 +110,7 @@ It is important to start simple, and build up a model in steps. The first step i
     Here we have created a `box` with a size of `0.4 x 0.2 x 0.1` meters. The `collision` element specifies the shape used by the collision detection engine. The `visual` element specifies the shape used by the rendering engine. For most use cases the `collision` and `visual` elements are the same. The most common use for different `collision` and `visual` elements is to have a simplified `collision` element paired with a `visual` element that uses a complex mesh. This will help improve performance.
 
 1.  Try out your model by running gazebo, and importing your model through the
-    [Insert Model](http://gazebosim.org/tutorials?tut=build_world&cat=build_world#AddingModelfromtheModelDatabase)
+    [Insert Model](/tutorials?tut=build_world&cat=build_world#AddingModelfromtheModelDatabase)
     interface on the GUI.
 
         gazebo
@@ -520,4 +520,4 @@ It is important to start simple, and build up a model in steps. The first step i
     Idea: A six wheeled vehicle with a scoop front loading mechanism.
 
 ## Next ##
-[Next: Attach Meshes](http://gazebosim.org/tutorials/?tut=attach_meshes)
+[Next: Attach Meshes](/tutorials/?tut=attach_meshes)

build_world/tutorial.md

@@ -8,7 +8,7 @@ This tutorial describes the process of creating a world with both static and dyn
 
 # Setup
 
-1.  Make sure Gazebo is [installed](http://gazebosim.org/tutorials?cat=install).
+1.  Make sure Gazebo is [installed](/tutorials?cat=install).
 
 1.  Start up gazebo, and you should see a world with just a ground plane.
 
@@ -129,4 +129,4 @@ The filename must be in the current working directory, or you must specify the c
 
 # Next
 
-[Next: Modifying a world tutorial](http://gazebosim.org/tutorials/?tut=modifying_world)
+[Next: Modifying a world tutorial](/tutorials/?tut=modifying_world)