Merge pull request #6 from Dumbris/patch-1

Merged pull request.
Add login, passcode, host headers to CONNECT frame, according to stomp-specification-1.1
Merge pull request #7 from Dumbris/connect_frame

Add login, passcode, host optional headers to CONNECT frame
Fixed wrongly places documentation
Merge branch 'master' of https://github.com/Apaq/StompDart
Refactored libraries. Expanded SocketAdapter to return host name for default hostname. Made a few changes to how hos header is set. Added more tests. Bumped version to 0.2.0.