Decoupled routing from HTTP
Added Router implement HttpServerInterface
Fully functional Symfony routes in application!
As a result, this drastically decreased backwards compatibility breaks while introducing new functionality
Moved HttpFoundation from require to suggest
Devs using Session component will need to include it manually
This will allow devs to use Ratchet with a stable minimum-requirement
Added the ability to turn UTF-8 encoding checks off to increase performance
Separated encoding checks into its own set of classes
Encoding checks now use mbstring or iconv depending on availability
