Created shared partial for footer to share between layouts.

Introduce unobtrusive_javascript plugin to start to beautify our html and reduce the size of our html pages. See http://www.ujs4rails.com/ for more info.
Implement unobtrusive_javascript for contexts listing page and project detail page.



git-svn-id: http://www.rousette.org.uk/svn/tracks-repos/trunk@430 a4c988fc-2ded-0310-b66e-134b36920a42

tracks/vendor/plugins/unobtrusive_javascript/init.rb

@@ -0,0 +1,21 @@
+require 'actionview_helpers_patches'
+require 'prototype_helper_patches'
+require 'scriptaculous_helper_patches'
+require 'asset_tag_helper_patches'
+require 'tag_helper_patches'
+require 'behaviour_caching'
+require 'ujs'
+
+# make plugin controllers and views available to app
+config.load_paths += %W(#{UJS::PLUGIN_CONTROLLER_PATH})
+Rails::Initializer.run(:set_load_path, config)
+
+# add methods to action controller base
+ActionController::Base.send(:include, UJS::ControllerMethods)
+
+# load in the helpers and caching code
+ActionController::Base.send(:helper, UJS::Helpers)
+ActionController::Base.send(:include, UJS::BehaviourCaching)
+
+# require the controller
+require 'unobtrusive_javascript_controller'