Add and use eina_stringshare_ref().
Add and use eina_stringshare_ref().

This is a faster "add", if we know we're using a shared string we know
the node without any need to search it, just increment reference and
exit.



SVN revision: 37458

tasn/enlightenment,rvandegrift/e,tasn/enlightenment,tizenorg/platform.upstream.enlightenment,FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,rvandegrift/e,FlorentRevest/Enlightenment