added doc string for documents.py and refactored code
added class uml of RESTApi project
added package uml of RESTApi project
added init.py for making dummydata generation a module
added init.py for making test  generation a module
added setup_django for loading django setting inside the module
added image retrieve test case
added map records api  test case
added receiver records api  test case
added watch records api  test case
added base mongo test cases
updated project settings
deleted single file based tests