Ran pep8 and pyflakes.
Moved definitions.  Implemented MFDataset.
Removed definitions, pep8'ed, pyflakes and typos.
Merge remote-tracking branch 'upstream/master' into pep_pyflakes
Ran pep8 and pyflakes.
Merge branch 'pep_pyflakes' of github.com:ocefpaf/system-test into pep_pyflakes

Conflicts:
	Theme_2_Extreme_Events/Scenario_2A_Coastal_Inundation/Scenario_2A_Extremes_Currents/Scenario_2A_Extreme_Currents.ipynb
	Theme_2_Extreme_Events/Scenario_2A_Coastal_Inundation/Scenario_2A_Extremes_Currents/Scenario_2A_Extreme_Currents.py
Latest output from a new run.
Merge pull request #155 from ocefpaf/pep_pyflakes

Pep8, pyflakes and MFDataset