Cleaned up Python bindings to restore functionality:
* StaticPersistence is iterable, its nodes are usable (sign, pair, cycle)
* StaticPersistence knows how to map its nodes into Filtration indices
* moved PythonCmp into utils.h
* minor cosmetic changes
set (targets
test-grid2D
combustion-vineyard)
if (use_dsrpdb)
set (targets ${targets}
pdbdistance-vineyard)
endif (use_dsrpdb)
add_definitions (${cgal_cxxflags})
foreach (t ${targets})
add_executable (${t} ${t}.cpp)
target_link_libraries (${t} ${libraries} ${cgal_libraries} ${dsrpdb_LIBRARY})
endforeach (t ${targets})