cmake LASlib examples

liminchen/OptCuts ext/libigl/external/cgal/src/CGAL_Project/demo/Polyhedron/CMakeLists.txt :305 

find_package(LASLIB)

CGAL/cgal Lab/demo/Lab/Plugins/IO/CMakeLists.txt :4 

find_package(LASLIB QUIET)

c42f/displaz CMakeLists.txt :70 

find_package(LASlib REQUIRED)