Log Message:
Update ruby-opengl to 0.60.1.
While here,
 * set LICENST=mit
 * remove patch-a{a,b} from distinfo, it should be removed with update to 0.60.

0.60.1 (February 16, 2009)
This is maintenance release.

 Changes in this release:
 Bugfixes
 Proper support for ruby 1.9/1.9.1+
 Updated OpenGL enumerators in preparation for OpenGL 3.0