Moved client filters into a trait
Merge branch '2.3.x_2.10' of github.com:scalatra/scalatra into 2.3.x_2.10
Provided a way to use ClientFilter with redis atmosphere plugin. ClientFilter was pulled into an abstract class and the old ClientFilter definitions now extend it. This allows us to serialize the ClientFilters and maintain the senders uuid.
Fixed problem where serialized data was getting wrapped inside of content element
Updates log message to properly include a named ClientFilter
Merge pull request #327 from jgrowl/2.3.x_2.10

Distributed redis broadcaster client filters