Added functionality to use new function "checkgroupfordisplay" in index.php. So long as this returns false, script moves to next group (or previous group). Should no longer display a page for a group where none of the conditions for display are met.

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/trunk/unstable@971 b72ed6b6-b9f8-46b5-92b4-906544132732