Add libpymolfile.i SWIG file

pymolfile/libpymolfile-old/AUTHORS

pymolfile/libpymolfile-old/COPYING

pymolfile/libpymolfile-old/README

pymolfile/libpymolfile-old/__init__.py

pymolfile/libpymolfile-old/libvmdmolfile.i

pymolfile/libpymolfile-old/libvmdmolfile.py

pymolfile/libpymolfile-old/numpy.i

pymolfile/libpymolfile-old/python_molfile.i

pymolfile/libpymolfile-old/xdrfile.c

pymolfile/libpymolfile-old/xdrfile.h

pymolfile/libpymolfile-old/xdrfile_trr.c

pymolfile/libpymolfile-old/xdrfile_trr.h

pymolfile/libpymolfile-old/xdrfile_xtc.c

pymolfile/libpymolfile-old/xdrfile_xtc.h

pymolfile/libpymolfile/f77_molfile.c

pymolfile/libpymolfile/libvmdmolfile.i

pymolfile/libpymolfile/libvmdmolfile.py

pymolfile/libpymolfile/tester.f

pymolfile/molfile/.lipo

pymolfile/molfile/__init__.py