Font Awesome support

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11926 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
bugfix

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11927 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
#7547

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11928 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
cosmetics

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11931 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c