Add the fortranformat project that is capable of parsing arbitrary Fortran
formats. We will use this library to correctly parse all Fortran formats that
are too complex for my existing, very basic (but much, much faster) parser to
handle.
Add license and copyright info for fortranformat (MIT). Incorporate
fortranformat into AmberFormat to handle 'complex' Fortran formats (in standard
prmtops, this includes the FORCE_FIELD_TYPE field in chamber-style topologies).

Updates to chamber topologies to reflect "proper" handling of the
FORCE_FIELD_TYPE section.

Update the setup.py script to install the fortranformat package.
Merge pull request #6 from swails/fortran-format

Fortran format