Remove ManagedConnection from the code (and dependence on forked stomp!)

* In setup, use proper stomp.py instead of our fork of it

* Use "Connection" instead of "ManagedConnection" throughout

* In syncstomp_from_args, cut "managed=True" as a keyword option, and always
  use Connection.

* Update Connection to start() and connect() on __init__, thus removing the
  need to call those specifically in several other packages when a Connection
  was created. (ManagedConnection itself had those in its __init__, so it's not
  really clear *why* anything else ever called those functions themselves.)
Fake test to keep Jenkins happy
Merge pull request #2 from LuminosoInsight/unmanaged

Remove ManagedConnection