Removed references for Xi framework as I don't want to use them anymore.
There are still some references to weed out.
Added JmeTagBundle.
Repalced xi bundle's Tag and Tagging classes with JmeBundle representatives.
Renamed xi_tag and xi_taging tables to tag and tagging to remvoe any references to xi framework.
Now ArticleServcie no longer extends a base service class.
Fixed 2.3 update related issues
Fixed errors with flash messages
Updated to Symfony 2.4
Updated jQuery and jQuery UI