T2 Allow Partial Search in Report Filter

* Added Partial Search Function to Custom Forms Reports Filter 
* Added Search-by-Keyword Function for Custom Forms Reports Filter
* User Story: p.16 Requirements Doc
* Documentation: http://jengeeks.wordpress.com/gsoc-2014/documentation/#PartialSearch
* Unit Tests: http://jengeeks.wordpress.com/gsoc-2014/unit-tests/