Update documentation and libraries in plugins

_plugins/sitemap.rb

@@ -1,4 +1,5 @@
-require 'open-uri'
+require 'yaml'
+require 'cgi'
 
 module Jekyll
 

_plugins/templates.rb

@@ -1,3 +1,9 @@
+require 'yaml'
+
+#This plugin generates all translated pages using templates in
+#_templates. The final file name of each page is defined in 
+#the url section of each translations in _translations.
+
 module Jekyll
 
   class TranslatePage < Page

_plugins/translate.rb

@@ -1,5 +1,5 @@
 require 'yaml'
-require 'open-uri'
+require 'cgi'
 
 #translate( id [,category ,lang] )
 #Return translated string using translations files