Moesifwsgi

Refactor:

- Remove job from the scheduler
- Update moesifapi to 1.3.3

Add:
- Support to fetch user Id from authorization header
- Helper functions to create event model
- Helper functions for config options

Refactor:
- Add Init method to the class
-Add Classmethod to the function who doesn't need class instance
- Test for Django1.9 and above & support for Python 2 and 3
- Update README.md

Fix:
- Return event model if config not provided
- Added checks before adding field to object

Add:
- Support for batching and queueing events