Working GZip support. Don't know how this would behave on servlet.
Remove a lot of the java synchronized wrapper with our own GZipper class
Merge branch 'topic/scalaz-task' into topic/gzipmiddleware

Conflicts:
	examples/src/main/resources/logback.xml
	netty/src/main/scala/org/http4s/netty/SpdyNettyHandler.scala
	netty/src/main/scala/org/http4s/netty/SpdyStreamContext.scala
Small visual changes.
Merge branch 'topic/gzipmiddleware' into topic/scalaz-task