completely remove QA module from OpenStructure

examples/demos/the_hammer.py

modules/conop/pymod/CMakeLists.txt

modules/conop/pymod/export_amino_acids.cc

modules/conop/src/CMakeLists.txt

modules/conop/src/amino_acids.cc

modules/conop/src/amino_acids.hh

modules/mol/alg/pymod/CMakeLists.txt

modules/mol/alg/pymod/export_clash.cc

modules/mol/alg/pymod/wrap_mol_alg.cc

modules/mol/alg/src/CMakeLists.txt

modules/mol/alg/src/clash_score.cc

modules/mol/alg/src/clash_score.hh

modules/qa/CMakeLists.txt

modules/qa/pymod/CMakeLists.txt

modules/qa/pymod/__init__.py

modules/qa/pymod/export_interaction.cc

modules/qa/pymod/export_reduced.cc

modules/qa/pymod/export_torsion.cc

modules/qa/pymod/export_utilities.cc

modules/qa/pymod/pdbtools.py