Bugfix

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10875 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Use json escaping for watermark

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10876 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c