Merge pull request #5 from caxy/master

Don't require page reload to post message
Set channel in the route defaulting to "default"

Make the default a controller parameter instead of a route parameter

Pass the channel parameter in the twig template as appropriate

Set form action to post back to channel even though it will not be used due to the AJAX calls

Remove unneeded Request parameter in listAction

Set the default in the route annotation, not in the controller function definition
Merge branch 'allow-multiple-channels'