Removed unnecessary debug_alchemy.py from tests.
Merge remote-tracking branch 'upstream/master' into test-alchemy
Fixed an issue with long-range dispersion correction in alchemical parts of system.
We need to revisit this at some point, since we should include alchemical contribution, but currently there is no way to do this correctly since switching function and repulsive component are mixed in.
Added new command to print available OpenMM platforms.
Updated nose tests for alchemy.py, significantly streamlining test definitions.
Added a utility to plot potential energy vs lambda to help debugging.
Cleaned up alchemy.py a bit, but running into an issue with OpenMM's numerical integration of long-range dispersion correction for TIP3P with reaction field and switch.
Added explicit p-xylene example and renamed implicit p-xylene example.
Added water in water example.
Fixed tip3p-in-tip3p example.
Updates to a few different areas.
Commented out problematic test cases.
Merge pull request #114 from jchodera/test-alchemy

Updated alchemy tests; minor revisions to alchemy.py.