Merge pull request #243 from kedar2a/mongokit

Error resolved in node_graph.html due to change of group_name to groupid
Bug removed: Now also updating user-groups & Files(Images/Videos) group_set field.
Bug resolved: Displaying group information.
Error resolved: img_type parameter added to save_file() function's parameter-list.
Bug resolved: Url-redirection regarding private groups.
Merge pull request #244 from AvadootNachankar/mongokit

Bugs removal regarding group_set migration
Bug resolved: Group-id passed as parameter in 'getImageThumbnail' and 'submitDoc' urls.
New classes added (Triple, GAttribute, GRelation) and GSyetm class modified (updated relation_set and attribute_set fields).
Merge pull request #245 from AvadootNachankar/mongokit

Classes Added/Updated and Bug resolved regarding user-dashboard
Updated CSS of graph div
Some CSS for title of graph
Changed graph area to acquire major portion of window.