fix trace check in recv()
Merge pull request #7 from somia/master

trace fix
- handshake is workable.
- support ABNF frame data transfer.
- not workable, yet.
- workable with echo.websocket.org
- set close frame
- add comment.
- change status name
- update description.
- fix installation error.
- delete print statement.
- update README change log
address issue #9 and other changes to the demo code
Merge pull request #10 from gregory80/master

Echo App Demo Throw Error: 'NoneType' object has no attribute 'opcode
- for next version.
Made the key be UUID4 instead of a UUID1.
Added a boolean keep_running flag to WebSocketApp so that the main loop can be interrupted.
Made the WebSocketApp accept a mask_key function which is passed on down to the actual socket.
update change log
Merge branch 'master' of https://github.com/dsuch/websocket-client