remember websocket upgrade
Merge pull request #243 from mokesmokes/sslws

Enable a direct websocket connection if the previous websocket connection ...
Add tests for remembering websocket upgrade

Add 'rememberUpgrade' section. Tests whether sockets remember the upgrade to
webscoket if and only if the 'rememberUpgrade' flag is set.
Merge pull request #257 from nlagrow/remember-upgrade

Add tests for remembering websocket upgrade
Automatically rewritten for npm.