Log Message:
update to 1.1.6
changes:
        - Documentation updates (STR #552, STR #608)
	- Added the 2.0 Fl_Widget::copy_label() method to
	  allow FLTK 1.x applications to have their label
	  strings managed by FLTK (STR #630)
	- Added Fl::delete_widget() method to safely delete
	  widgets in callback methods (STR #629)
	+bugfixes