re-add language to cpp
re-add language to cpp

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