Test GUI functions on osx travis until I figure out what is up with linux. Run TestSlic3r on both.
Test GUI functions on osx travis until I figure out what is up with linux. Run TestSlic3r on both.

pieis2pi/Slic3r,pieis2pi/Slic3r,curieos/Slic3r,alexrj/Slic3r,lordofhyphens/Slic3r,lordofhyphens/Slic3r,curieos/Slic3r,alexrj/Slic3r,curieos/Slic3r,pieis2pi/Slic3r,alexrj/Slic3r,lordofhyphens/Slic3r,alexrj/Slic3r,curieos/Slic3r,curieos/Slic3r,curieos/Slic3r,lordofhyphens/Slic3r,alexrj/Slic3r,pieis2pi/Slic3r,lordofhyphens/Slic3r,pieis2pi/Slic3r,lordofhyphens/Slic3r,pieis2pi/Slic3r,alexrj/Slic3r