Revert MMCIF Parser to move to own branch

modules/io/pymod/CMakeLists.txt

modules/io/pymod/__init__.py

modules/io/pymod/export_mmcif_io.cc

modules/io/pymod/wrap_io.cc

modules/io/src/mol/CMakeLists.txt

modules/io/src/mol/mmcif_reader.cc

modules/io/src/mol/mmcif_reader.hh

modules/io/src/mol/star_parser.cc

modules/io/src/mol/star_parser.hh

modules/io/tests/CMakeLists.txt

modules/io/tests/test_mmcif_reader.cc

modules/io/tests/testfiles/mmcif/atom_site.mmcif