Error-tracker

Due to supports of Django and Flask in the same code, it downloads all dependencies, whereas Django developer would not require Flask in theory and vice-versa.

* Protect views => In older release, exception pages could be browsed by anyone, now for Django only admin can browse whereas for Flask a view_permission object need to be passed.
* Django REST Framework request body support.
* Support some more ways to capture exception

* Using context manager
* Capture a specific message
* Capture exception with additional context details

* Fixed issue in email subject
* Exposed two internal apis to directly use them

* Support for Django
* Support for Flask
* Support for standalone Python application