WIP Awais786/course info api

@stephensanchez    We have implemented initial api workflow.  Can you please take a look ?

following is api url.
/api/courseabout/v1/course/about/[course-id]
Please revisit all the doc strings I created and update them according the fields that will be available currently, and replace all my TODO's.

We use napoleon style doc strings http://sphinxcontrib-napoleon.readthedocs.org/en/latest/example_google.html