Merge pull request #524 from kedar2a/mongokit

Documentation/comments added in file.py on how to return ObjectId of already existed file
Some Indian Languages added to Language drop-down list
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit
Merge pull request #525 from supriyasawant/mongokit

Indian Languages added to Language drop-down list.
Minor changes in template, to display the themes hierarchy
Merge pull request #526 from sunnychaudhari/mongokit

Minor changes in template, to display the themes hierarchy
get_profile_pic() method added
Merge branch 'mongokit' into mongokit-forum
added method to count threads
Showing total replies to thread in forum detail page