fix announcement links & files

Gemfile

@@ -1,6 +1,8 @@
 source 'http://rubygems.org'
 gem 'rails', '>=3.1.0', '<3.2.0'
 
+gem "brakeman"
+
 gem 'bson_ext'
 gem 'carrierwave'
 gem 'carrierwave-mongoid', :require => 'carrierwave/mongoid'
@@ -13,6 +15,7 @@ gem 'kaminari', :git => 'git://github.com/amatsuda/kaminari.git'
 
 gem 'mini_magick'
 gem 'mongoid'
+gem "mongo_session_store-rails3"
 gem 'radius'
 gem 'rake'
 gem 'ruby-debug19'
@@ -20,7 +23,7 @@ gem 'rubyzip'
 gem 'sinatra'
 gem 'sprockets'
 gem 'tinymce-rails'
-# gem 'therubyracer'
+#gem 'therubyracer'
 
 # Gems used only for assets and not required
 # in production environments by default.