Revert "move courses mixed To projecthelper From applicantionHelper"

This reverts commit 42332201f2.

app/helpers/application_helper.rb

@@ -28,6 +28,8 @@ module ApplicationHelper
   include AvatarHelper
   ## added by william
   include PraiseTreadHelper
+  # add by nyan
+  include CoursesHelper
 
   extend Forwardable
   def_delegators :wiki_helper, :wikitoolbar_for, :heads_for_wiki_formatter

app/helpers/projects_helper.rb

@@ -19,9 +19,6 @@
 
 include AvatarHelper
 module ProjectsHelper
-  # add by nyan
-  include CoursesHelper
-  
   def link_to_version(version, options = {})
     return '' unless version && version.is_a?(Version)
     link_to_if version.visible?, format_version_name(version), { :controller => 'versions', :action => 'show', :id => version }, options