Created files for AMOEBA 2013 force field
Added documentation and header information for AMOEBA 2013 force field
Merge branch 'amoeba' of github.com:peastman/openmm
Fixed bug in app where 'useDispersionCorrection' for AMOEBA was being cast to int instead of bool.
Added AMOEBA test system and tests for ForceField fin setting up AMOEBA system.
Fixes to tests.
AmoebaTorsionTorsionForce can calculate derivatives of the grid points automatically
Fixed incorrect specification of torsion-torsion terms in AMOEBA 2013 force field
Merge branch 'master' of github.com:SimTk/openmm
Merge branch 'amoeba' of github.com:peastman/openmm
Regenerated AMOEBA 2013 force field based on corrected parameter file
Merge branch 'amoeba' of https://github.com/peastman/openmm into peastman-amoeba
Merge branch 'peastman-amoeba'
Merge pull request #455 from peastman/master

Implemented AMOEBA 2013 force field
Fixed incorrect units in AmoebaStretchBendForce.getStretchBendParameters()
Merge pull request #457 from peastman/master

Fixed incorrect units in AmoebaStretchBendForce.getStretchBendParameters()
Added tip3p-fb and tip4p-fb parameter files.
Merge branch 'master' of github.com:SimTk/openmm
Seed the rng from urandom
separate files