Merge branch 'CGAL-use_leda-GF-OLD' into CGAL-use_leda-GF
Conflicts:
Arrangement_on_surface_2/test/Arrangement_on_surface_2/construction_test_suite_generator.cpp
Arrangement_on_surface_2/test/Arrangement_on_surface_2/test_construction.cpp
Documentation/doc/Installation.txt
Kernel_23/include/CGAL/Exact_predicates_exact_constructions_kernel.h