Add methods to set and delete content overrides.
Add method to get all content overrides for a consumer
Remove errant semi-colon.
Add __hash__ method to Content classes.
Send empty JSON list when deleting all overrides.
Add default full_refresh_on_yum option.
Add test cases for Content.__eq__
Correct implementation of __eq__ for Content objects.
Merge pull request #99 from candlepin/alikins/content-override-content-compare-test

Alikins/content override content compare test