Fix the list containing closed connection so testDisconnect waits forever
Merge branch 'refs/heads/ImageServer' into dev
Merge remote-tracking branch 'refs/remotes/origin/dev' into dev
Merge branch 'dev' of github.com:yyfearth/life-stream into dev
First workable version with user server, web server and image server and same test sample code

Workable user server
A simple web server
Image server with heartbeat and JPA
C++/Python client sample code (in netty-protobuf-test)
Unfinished image processor with EXIF reader