Add the initial implementation for the permessage-deflate implementation
This is a work-in-progress
- There are still multiple Autobahn failures (or rather there will be once it is plumbed in)
- No support (yet) for compression of outgoing messages

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1604810 13f79535-47bb-0310-9956-ffa450edef68
Add some inner classes that will be required when Transformation / extension support is plumbed in.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1604818 13f79535-47bb-0310-9956-ffa450edef68