Update to Rails 4.0.2

encrypted_cookie_store removed during rails beta. Using normal cookie_store instead.

faye-rails is missing Rails 4 support.
Merge branch 'master' into rails4
Rails 4 compatibility for faye-rails

Use the rails4 compatible faye-rails branch until that fix is released.
Rails 4 compatibility for faye

This app requires concurrency. Normally config.threadsafe! cannot be turned on in development mode.
jamesotron/faye-rails#41 suggests removing the Rack::Lock middleware to resolve the deadlock mentioned in faye/faye#190.
This enables concurrency in development mode. Hopefully there won't be any concurrency issues. ;-)