implement heuristic processor

modules/conop/pymod/export_heuristic.cc

modules/conop/pymod/export_processor.cc

modules/conop/pymod/export_rule_based.cc

modules/conop/pymod/wrap_conop.cc

modules/conop/src/heuristic.cc

modules/conop/src/heuristic.hh

modules/conop/src/processor.cc

modules/conop/src/processor.hh

modules/conop/src/rule_based.cc

modules/conop/src/rule_based.hh

modules/conop/tests/CMakeLists.txt

modules/conop/tests/helper.cc

modules/conop/tests/helper.hh

modules/conop/tests/test_heuristic_conop.cc

modules/io/pymod/__init__.py

modules/io/pymod/export_pdb_io.cc

modules/io/src/mol/io_profile.hh

modules/io/tests/test_io_pdb.cc

modules/io/tests/test_io_pdb.py

modules/io/tests/testfiles/pdb/ter4.pdb