[#1212] Fire handshake status events to notify the user about handshake states
[#1211] Fail ChannelPromise on SpdyProtocolException like it was before in 3.x
[#1202] Fix javadoc
SPDY: allow multiple notification of closeSessionFuture
upgrade to maven 3.0.5

As Netty is using its own CI now
Fix typo in BufType javadoc
Merge branch 'master' into checkstyle_test_source