Apply Apache Version 2.0 License

core/src/geom_stems.hh

core/src/graph.cc

core/src/graph.hh

core/src/graph_minimizer.cc

core/src/graph_minimizer.hh

core/src/message.hh

core/src/portable_binary_data_sink.hh

core/src/portable_binary_data_source.hh

core/src/portable_binary_serializer.hh

core/src/runtime_profiling.hh

core/src/superpose.cc

core/src/superpose.hh

core/src/tetrahedral_polytope.cc

core/src/tetrahedral_polytope.hh

core/src/tree.cc

core/src/tree.hh

core/tests/test_check_io.cc

core/tests/test_graph_minimizer.cc

core/tests/test_helper.py

core/tests/test_pm3argparse.py