Ditch datatables for something better

[stas]

Recode sorting and searching in PHP and ditch datatables. Reasons:

• bad sorting algorithm for dates
• needs configuration

[stas]

Reference: http://buddypress.org/community/groups/buddypress-courseware/forum/topic/assignment-due-date-sorting-bug/#post-69842

[stas]

Use https://github.com/riklomas/quicksearch and https://github.com/ludo/jquery-plugins/tree/master/treeTable instead of datatables.

Treetable to build hierarchical courses and search for filtering. Ditch js sorting, it will be handled server side.

[vinaysagar4u]

Any improvement this side?