Merge pull request #1 from proteneer/master

Remove SVN specific info from CMakeLists
Implemented Modeller.addExtraParticles().  Also some cleanup in ForceField.
Added README.md
Added README.md
Merge pull request #3 from kyleabeauchamp/readme_md

Readme md
Added links into README.md for API references
Implemented serialization for Drude plugin
ForceField supports DrudeForce
Merge pull request #4 from peastman/master

Most of the features to support Drude particles are now complete and functional
Fixed bug in CustomIntegrator's handling of massless particles (see bug 1871)
Fixed errors in DrudeLangevinIntegrator in mixed or double precision mode
Created DrudeSCFIntegrator, including reference implementation
Merge pull request #5 from peastman/master

Fixes to a couple of bugs (in CustomIntegrator and DrudeLangevinIntegrator)
Fixed linker errors on Windows
Merge pull request #6 from peastman/master

Fixed linker errors on Windows
Merge branch 'master' of https://github.com/SimTk/openmm