Docs for first_traj_ensemble in toy ipynb
Toy ipynb: Bootstrap, except storage.

Also put together the skeleton for the TIS equilibration.
More skeleton for toy ipynb
Start global state reorg.
Steps on globalstate.
Merge remote-tracking branch 'upstream/master' into global_movers

Conflicts:
	opentis/calculation.py
Merge remote-tracking branch 'upstream/master' into toy_dynamics_example

Conflicts:
	examples/ipython/toy_dynamics_tis.ipynb
added engine_store.py
cleanup
cleanup
fixes and corrections for testopenmmengine
Mostly comment updates; a little restructuring
Zeroth order version of SampleSet

Untested, probably full of problems. But I hope this is enough that JHP can
add storage support.
Finished draft of SampleSet.

Now I need to start writing tests for it to make sure it does what I think
it does.
Skeleton of tests for SampleSet.
Removed storage requirement from boostrap calc
Steps toward fixing the shooting mover.

There's a problem that one-way shooting gets stuck when you have a 3-frame
trajectory. This probably means that we're not really shooting from the
frame we think we're shooting from.
I think I fixed it.
Commented debug setattrs in shooting movers
Test PR. Having issues with running tests locally

Could be a problem with my local install; want to see if Travis will pass
this. This is the current choderalab/master, plus an empty file, so if it
doesn't pass the tests then the question becomes version numbers and such.