Update site configuration to support Jekyll 3.0 (mandatory for GitHub Pages)

Ignore transient gem files

Migrate from Pygments to Rouge as part of Jekyll 3.0 support

Fix Liquid warnings due to non-printing characters in tags

Remove reference to (non-existent) cookbook

Author: vicchi

Diff for: .gitignore

@@ -1 +1,2 @@
-_site
+_site
+/Gemfile.lock

Diff for: Gemfile

@@ -1,3 +1,3 @@
 source 'https://rubygems.org'
 
-gem 'github-pages'
+gem 'github-pages', group: :jekyll_plugins

Diff for: _config.yml

@@ -1,5 +1,5 @@
-highlighter: pygments
-markdown:    redcarpet
+highlighter: rouge
+markdown:    kramdown
 exclude:     [ README.md, Gemfile ]
 
 name:        Geocoder

Diff for: index.markdown

@@ -63,20 +63,14 @@ Documentation
 
 Here are the links to the official and complete documentation pages:
 
-* [Geocoder documentation]({{ site.url }}Geocoder)
+* [Geocoder documentation]({{ site.url }}Geocoder)
 * [GeocodableBehavior documentation (Propel)]({{ site.url }}GeocodableBehavior)
 * [GeocoderBundle documentation (Symfony2)]({{ site.url }}BazingaGeocoderBundle)
 * [StackGeoIp documentation (Stack Middleware)]({{ site.url }}StackGeoIp)
 * [GeocoderServiceProvider documentation (Silex)]({{ site.url }}GeocoderServiceProvider)
 * [GeocoderLaravel documentation (Laravel 4)]({{ site.url }}GeocoderLaravel)
 
 
-Cookbook
---------
-
-In this cookbook, you will find specific solutions for specific needs.
-
-
 License
 -------