Add post database events and review event names
Ohh, I'm a bad boy. flake8 fixes
Using assertEqual instead of assertEquals

This removes a DeprecationWarning in travis.
Updated documentation

- References to document instead of item changed for the database
  events.
- Summarize a bit the narrative in the event description due to the
  double amount of events we have now.
Removed the `id` param in `on_fetched_item` event.
Merge branch 'database-events' of github.com:graffic/eve into graffic-database-events

Conflicts:
	eve/methods/delete.py
	eve/methods/get.py
	eve/methods/patch.py
	eve/methods/put.py
	eve/tests/methods/delete.py
	eve/tests/methods/patch.py
	eve/tests/methods/post.py
Fix rst table
Add post database events; events review.