[NEW] Implement Tablesorter jQuery plugin for the users table and set base code for applicaiton to further tables.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@46573 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] plugin fancytable: handle placeholders in jQuery and other cleanup related to Tablesorter. To be superseded when changed to the /lib/core/Table implementation

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@46574 b456876b-0849-0410-b77d-98878d47e9d5