Add workaround for unpatched Internet Explorer bug

Workaround an IE bug. http://support.microsoft.com/kb/927917/en-gb
This also affects IE8 but in a different way, making it impossible to
add to cart.
http://blogs.msdn.com/b/ie/archive/2008/04/23/what-happened-to-operation-aborted.aspx

Also changed to use jquery.colorbox-min.js and moved the rel to
JavaScript.
Merge pull request #248 from ADDCreative/patch26

Add workaround for unpatched Internet Explorer bug
a fix for http://www.slideshare.net/DefconRussia/reutov-yunusov-nagibin-random-numbers-take-ii
updated the category system to use Hierarchical Data Closure Table Pattern
more category optimization done
more category work done
more category work done
more category work done
Fix for clicking to remove first option

If you currently remove the first option, then you end up with a blank page, reason being is the $('#vtabs a:first').trigger('click'); is called before the deletions, just need to move it after. 
near finished the updated category system
missed the parent id getting updated when categories is being edited
categories finished
fixed Search ignores category
fix for Disabled rating can be seen in the compare pages
fixed Double setting_id (128) in opencart.sql
increased the delay in auto complete so it gives you more time to finish typing before showing results.
fix for Setting an items per page limit that matches a preset number causes redundant entries
Merge pull request #252 from rebdog/master

Fix for removing 'first' option in admin
sort by price problem fix
added to Top Administrator Group catalog/filter permission