Some style guide fixes, docstring fixes and removal of unused imports in different modules. Rename acceptInvite view variable to accept_invite in soc.views.models.host module to comply to our style guide.
Patch by: Pawel Solyga
Review by: to-be-reviewed
Coverage: code coverage testing for Python
Coverage.py is a Python module that measures code coverage during test execution.
It uses the code analysis tools and tracing hooks provided in the Python standard
library to determine which lines are executable, and which have been executed.
For more information, see http://nedbatchelder.com/code/modules/coverage.html