PIVOT-922:
Several renderers were not calling their "toString" methods from the "render" method
so that a custom renderer that overrides "toString" would not see any benefit.

This is a merge of revision 1523205 from trunk to branches/2.0.x.



git-svn-id: https://svn.apache.org/repos/asf/pivot/branches/2.0.x@1523374 13f79535-47bb-0310-9956-ffa450edef68