added prmtop parser to topology.py
cleaned docstring and code
added test
moved prmtop parsing to own file
added prmtop reading to md.load
fixes thanks to roberts feedback
Merge branch 'master' into prmtop
prmtop
Fixes
I think this is ready to go now
Merge pull request #338 from rmcgibbo/prmtop

Prmtop