Frozen columns support for new scroll enhancements

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11813 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Improved checks for default sort by resolution.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11814 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
added timeout ajax option

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11815 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c