Tear Down and Resource Cleanup

[benjchristensen]

I have little confidence in everything being properly connected for clean tear down when a connection closes, or when an error occurs. Need to unit test and prove resources are released or cleaned up.

[NiteshKant]

@stevegury I think this is fixed by #107 ?

[stevegury]

Yes, but it still lacks unit-tests.

[NiteshKant]

0.5.x handles underlying connection close correctly. Closing this issue.