Fixed memory leak, where DefaultChannelPipeline objects are not released. (Every connection had some objects which could not be garbage collected)
Fill in support for ping/pong message sending
Add idlePingFrequency to WebSocket (with bad API)

This automatically sends an empty ping frame after a duration
with no messages sent on the socket. Adding the mutable
idlePingTimeout on WebSocket gets the job done but we should find a
better way.
Bump the built finagle-websocket version to 6.20.0.0
Merge pull request #1 from pteichman/ping-pong

Ping pong