Changes to CMakeLists:
* Optimize and debug options derive flags from CMKAE_CXX_FLAGS*
* Moved CGAL CXX flags from the top level to the specific locations where they are required
set (targets
ar-vineyard)
add_definitions (${cgal_cxxflags})
foreach (t ${targets})
add_executable (${t} ${t}.cpp)
target_link_libraries (${t} ${libraries} ${cgal_libraries})
endforeach (t)