added step-by-step installation instructions and license info

Author: GSI2013

README.textile

@@ -7,15 +7,26 @@ Be sure to know your reasons when using it.
 
 h2. Installation
 
-Set the variable @PATH_TO_JEKYLL_SITE@ correctly and run these commands accordingly:
+Set the constant @PATH_TO_JEKYLL_SITE@ correctly and run these commands accordingly:
 
 pre. echo "gem 'jekyll_image_encode'" >> $PATH_TO_JEKYLL_SITE/Gemfile
 bundle
 echo "require 'jekyll_image_encode'" >> $PATH_TO_JEKYLL_SITE/_plugins/ext.rb
 
 
+*Alternatively* you may accomplish the same without @echo@ and @bundle@:
+
+# Install the plugin by running @gem install jekyll_image_encode@
+# Add the line @require 'jekyll_image_encode'@ to *./_plugins/ext.rb*
+
+
 h2. Usage
 
 In the source attribute of an HTML *img* element, call the *base64-tag* providing the image URL as the only parameter:
 
-pre. <img src="{% base64 http://example.org/image.png %}" />
+pre. <img src="{% base64 http://example.org/image.png %}" />
+
+
+h2. License
+
+Jekyll Image Embed is released under the "MIT License":http://www.opensource.org/licenses/MIT.