[Rails] Move most of the contents of the compass initializer back to the compass codebase. Discover compass extensions automatically during boot.

lib/compass/app_integration/rails.rb

@@ -34,6 +34,13 @@ module Compass
         end
       end
 
+      def initialize!
+        rails_root = (defined?(Rails) ? Rails.root : RAILS_ROOT).to_s
+        Compass.add_project_configuration(File.join(root, "config", "compass.rb"))
+        Compass.discover_extensions!
+        Compass.configure_sass_plugin!
+        Compass.handle_configuration_change!
+      end
     end
   end
 end

lib/compass/app_integration/rails/installer.rb

@@ -105,10 +105,8 @@ NEXTSTEPS
 
         def initializer_contents
           %Q{require 'compass'
-            |rails_root = (defined?(Rails) ? Rails.root : RAILS_ROOT).to_s
+            |require 'compass/app_integration/rails'
-            |Compass.add_project_configuration(File.join(rails_root, "config", "compass.rb"))
+            |Compass::AppIntegration::Rails.initialize!
-            |Compass.configure_sass_plugin!
-            |Compass.handle_configuration_change!
             |}.gsub(/^\s+\|/,'')
         end