Moesifdjango

Fixes:
- Not sending rsp_time causing latency to be 0ms

Fixes:
- Django 1.9 or older: You cannot access body after reading from request's data stream

Fixes:
- IndentationError: unindent does not match any outer indentation level

Add:
- Error messages for Middleware in Django 1.9 and older

Add:
- ability to add custom metadata to a request

Add:
Support for base64 encoded binary data

Updated:
Docs regarding using MASK_EVENT_MODEL and more examples

Fixes:
Normalize Request and Response HTTP Headers
Cleanup debug messages