moved session store to the database
remove the user billing info update logic from observer and add into controllers
removed key from session store initializer
Merge pull request #291 from diogob/database_session

moved session store to the database
Merge pull request #292 from devton/move_user_billing_info_logic

remove the user billing info update logic from observer and add into con...
fix some security ;)
update payment method when user select another payment tab [Fix #53188167]
fix permissions and added a spec
Merge pull request #293 from devton/fix_53188167

Update payment method when user select another payment tab
Merge branch 'master' of git://github.com/catarse/catarse into rails-4
Add activerecord-session_store gem