Updates composer.json (Requires cboden/Ratchet).
This commit moves some code from internall project.
Fixes php 5.3 compatibility.
Update .travis.yml.
Update README.md.
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TopicRegistry moved to the LitGroup\Bundle\WampBundle\Wamp namespace.
Handler\TopicHandlerInterface -> PubSub\BrokerInterface
Added Loop\LoopManagerInterface
Refactoring. Adds tests for Container Extension.
Fix code style and comment in ServerRunCommand.
WampAppServer tests refactored.
Revert "Fix code style and comment in ServerRunCommand."

This reverts commit 97049532a9ac73d32c29a35d1ef31e4b600e7f82.
Merge branch 'develop' of github.com:LitGroup/LitGroupWampBundle into develop
Refactors WampAppServerTest.
Refactors WampAppServer
Adds LoopManager. (Periodic callback feature).
Changes subnamespace Loop -> EventLoop.
Registers LoopManager service.
Adds LoopManager and support of the "litgroup_wamp.periodic" tag.
Fixes mistakes in the documentation.
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