work on progress of reference implementation for issue #36
flake8 fix
flake8 fix
started writing tests and found numerous bugs (and squashed them)
implemented the read function
made the mode attribute public, and refactored the hdf5reporter to use the hdf5trajectory class
removed unused imports, ran flake8
tests to the reporter
rebased against master, added to test, fixed one bug
forgot os import
try to make this work on travis
chaged the loaders and savers in trajectory.py to use the new hdf5 format, but left the old one as _load_legacy_hdf
fixed a bug in trajectory join function that was discarding a single frame from unitcell_vectors
install simtk.unit on travis
pull simtk.unit from github
added the delayed import tool for issue #47
change name lambdaValue to alchemicalLambda
change lambda in the tests too
add an __all__ to hdf5
resolve merge conflicts with master