More work on PrimeUI TreeTable, added remote data support.

git-svn-id: http://primefaces.googlecode.com/svn/primeui/trunk/src/main/webapp@11493 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Implemented selection for PrimeUI treetable

git-svn-id: http://primefaces.googlecode.com/svn/primeui/trunk/src/main/webapp@11494 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c