Merge pull request #603 from planemad/mongokit

Update header size on cards
Merge pull request #605 from planemad/mongokit

CSS updates
Forum notifications enabled in forum.py
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit
Ratings division by 0 error solved for new nodes
Notifications mails to group members added in create forum
Error resolved on already file uploaded
Merge pull request #606 from Dhiru/mongokit

Error resolved on already file uploaded
Merge pull request #607 from anujag/mongokit

Notifications in create forum added
Move html contents of mobwrite to be part of orgitdown