switched fragment caching to filestore

Author: Rahoul Baruah

.gitignore

@@ -1,7 +1,8 @@
 db/database.yml
 log/*
-tmp/*
 db/*.sqlite3
 index
 .DS_Store
-public/cache/*
+tmp/pids
+tmp/sessions
+tmp/sockets

config/environments/production.rb

@@ -15,7 +15,7 @@
 config.action_controller.perform_caching             = true
 
 # Use a different cache store in production
-# config.cache_store = :mem_cache_store
+config.cache_store = :file_store, "#{RAILS_ROOT}/tmp/cache"
 
 # Enable serving of images, stylesheets, and javascripts from an asset server
 # config.action_controller.asset_host                  = "http://assets.example.com"