Stomp-py

* Merge patches from Ville S:
* auto-send content-length when message body is present (https://github.com/jasonrbriggs/stomp.py/pull/48)
* unescape header names in addition to values (https://github.com/jasonrbriggs/stomp.py/pull/49)
* remove unnecessary code (https://github.com/jasonrbriggs/stomp.py/pull/50)

* Merge patch from Ville S to fix coverage in setup (https://github.com/jasonrbriggs/stomp.py/pull/44)
* Add Ville's change for None-check in backward3.decode (plus unit tests)

* Merge patches from Ville S covering invalid module references for colours in the CLI, fixing an attribute error and correctly
invoking the python exe using sys.executable (https://github.com/jasonrbriggs/stomp.py/pull/41,
https://github.com/jasonrbriggs/stomp.py/pull/42, https://github.com/jasonrbriggs/stomp.py/pull/43)

* Merge patch from George G (https://github.com/jasonrbriggs/stomp.py/pull/31) to fix binary message handling. Note that current
text-only behaviour is still the default (auto_decode=True on the connection), but will be switched to false in a future
release, before ultimately being removed.
* Merge code cleanup patches from Ville S (https://github.com/jasonrbriggs/stomp.py/pull/35,
https://github.com/jasonrbriggs/stomp.py/pull/36)
* Merge another code cleanup patch from Ville E (https://github.com/jasonrbriggs/stomp.py/pull/37)

* Catch attribute error in SSL import (https://github.com/jasonrbriggs/stomp.py/issues/30)
* Set default ssl Version to TLSv1

* Fix for type error in transport logging (https://github.com/jasonrbriggs/stomp.py/issues/29)