upgrading websocketpp to the latest version 0.8.1
fix openssl error by upgrading websocketpp
Merge branch 'master' of https://github.com/socketio/socket.io-client… …-cpp
add boolean message type, fix crash of a synchronization bug
breaking change of ack callback, windows compile fix for PR
fix wild reconnect after too many times
Merge remote-tracking branch 'origin/tls'
fix console demo compile issue in VS2012SP4
fix link error of sio::event accessors
unify use of 'std' prefix