[#1579] Fix resource leakage in WebSocketUtil.base64(...)
SPDY: port SpdySessionHandler to netty 4
Fix sendNumbers logic
Use Unpooled to allocate buffer in Base64
Add missing closing paren
[maven-release-plugin] prepare release netty-4.0.1.Final
SPDY/3.1: add session level flow control

- with Michael Schore <mschore@twitter.com>