changes for join
merged branch into code

Conflicts:
	gnowsys-ndf/gnowsys_ndf/ndf/management/commands/filldb.py
	gnowsys-ndf/gnowsys_ndf/ndf/models.py
	gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/base.html
	gnowsys-ndf/gnowsys_ndf/ndf/templatetags/ndf_tags.py
	gnowsys-ndf/gnowsys_ndf/ndf/views/methods.py
changes
Added Group join - notification

Conflicts:
	gnowsys-ndf/gnowsys_ndf/ndf/management/commands/filldb.py
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit

Conflicts:
	gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/display_collection.html
	gnowsys-ndf/gnowsys_ndf/ndf/templatetags/ndf_tags.py