Log Message:
Updated cad/klayout to 0.24.9
-----------------------------
From: http://klayout.de/development.html
Release date: 2016-11-29
 Enhancements: The RBA::Region#smooth function was enhanced to give
 	       somewhat better results
 Enhancements: DXF's circle approximation can now also specified
 	       through an "accuracy" parameter: if less than the number of \ 
specified
	       points is required to achieve the given accuracy, the number is
	       reduced accordingly. This also applies to the polygon interpolation
	        of spline and arc curves.

 Enhancement: RBA integration now is compatible with Ruby 2.3 which
	      allows building on Ubuntu 16 as well.
 Enhancement: OASIS files with instance angles >360 were rejected
 	       before. Now, this has turned into a warning.

 Bugfix: DEF reader was failing to read MASK/via combinations.
 Bugfix: The marker browser's "show only rules with errors" option was
	 enabled again on sorting of errors.
 Bugfix: DRC: Using Layout objects for inputs didn't work
 Bugfix: Copying Hierarchy treets containing PCell's made the PCell's
 	  being turned into static cells.