Created pusher class
Modified pusher
Added test channels
Merge branch 'develop' of github.com:nfqakademija/audero into feature-pusher

Conflicts:
	composer.lock
	src/Audero/WebBundle/Controller/MainController.php
	src/Audero/WebBundle/Resources/views/Main/index.html.twig
Changed default session handler to PDO
Created new services file
Configured pusher to work with uploader
Added .idea folder to .gitignore
Added PDO session parameters to parameters.yml.dist