create store for orderparameters
more cleanup for op storage
Implemented PathReversal and ReplicaExchangeMove
Added GlobalState class
Fixed more on OrderParameter storage
Changed snapshot behaviour to be stored separately
fixed errors in storage simplification
Merge branch 'master' of github.com:choderalab/msm-tis into snapshotchange

Conflicts:
	opentis/snapshot.py
Fixed sandbox and Simulator to run with new OpenMM Simulator object
Fixed showtree.py for new storage
Fixed showtree.py plot range
minor improvesments on globalstate
Added GlobalState with showtree support
fixed horizontal shift error in showtree
Possible fix for velocity-less trajectories.
Updates to from_mdtraj.

Waiting on fixes that should come with the merge of choderalab#49.
Merge branch 'pr0049'

Conflicts:
	opentis/storage/netcdf_storage.py
	opentis/storage/trajectory_store.py
	opentis/trajectory.py
Fix for package-based import.
Fix to run sandbox w/ md engine abstraction layer
Merge branch 'pr0049'
Merge pull request #1 from dwhswenson/pr0049

Possible fix for velocity-less trajectories