added forum app
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit

Conflicts:
	gnowsys-ndf/gnowsys_ndf/ndf/templatetags/ndf_tags.py
	gnowsys-ndf/gnowsys_ndf/ndf/urls/__init__.py
	gnowsys-ndf/gnowsys_ndf/ndf/views/group.py
Merge pull request #58 from Dhiru/mongokit

modification in video module
Merge branch 'mongokit' of https://github.com/anujag/gstudio into anujag-mongokit
Error resolved after testing madam(anajag)'s code
Modifications regarding resolving unicode issue.
Modifications regarding resolving unicode issue.
Modifications regarding ordering of both prior_node & collection_set.
Modifications regarding resolving unicode issue, and ordering of both prior_node & collection_set.
Listing image,video,file acording to group feture implemented
Merge branch 'mongokit' of https://github.com/krishna31/gstudio into krishna31-mongokit
inclusion of mathjax