New component p:link, similar to h:link with theme support and opens up extensions to mobile

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10710 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Added mobile renderer for p:link

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10712 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c