Merge pull request #849 from sunnychaudhari/collection

Made the shelf & user guide button hidden
Seperated discussion code from node_ajax_view.html and created discussion.html
Change the text on discussion tab based on replies/comments
Merge pull request #850 from kedar2a/mongokit-discussion

Changed the text on discussion tab based on replies/comments
card view modified
card view modified
card view modified
card view modified
card view modified
Query modified to display the all file type objects according to 8 categories
pagination.html inclusion with added variables
Made pagination.html generic so that anyone/anywhere can use it.
Merge pull request #851 from kedar2a/mongokit

Made pagination.html generic so that anyone/anywhere can use it.
Bug resolved in displaying video thumbnails
Conflict resolved