{Mac} Bundle CloudCompare.app

These commits allow CloudCompare.app to be bundled with the shaders and the cc plugins included.  As with ccViewer it accepts drag-and-drop of different file formats.

**Note:** Will not work when compiling with some of the optional support (PDMS, LIBE57, or LIBLAS).  XIOT will work, but I don't even know if the rest of them compile on Mac OS X.  To add any of the others, the get_support_libs() function at the bottom of CMakeInclude.cmake needs to be modified.