Initiated more powerful datatable filtering with custom filter facet support and new built-in modes

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10882 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Use object not string

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10883 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Advanced filtering work

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10884 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c