updated units from 'knot' to 'knots' since that's what C++ reads
Merge commit 'df4c4d247a0fb0290ccef63601e746cbb0522b07' into refac_persist
filename for wind data now has prefix: wind_data_xxxx
spill and spill container unit tests were failing due my incorrect handling of some incoming arguments in the Release class
Merge branch 'refac_persist'
Enabled the get method to return a request specification if no id is specified.  Nathan had requested this change to the web api.
New web APIs for Gnome Release objects.  (still work-in-progress)
updated State object so it accepts tuples for initializing/adding new fields
added tests for different ways of initializing/adding fields: tuples, lists, a string
Merge branch 'master' of https://trac.orr.noaa.gov/git/GNOME2
cleaned up _check_inputs()
- updated orderedcollection __contains__ to check if an object is in the
collection as opposed to its ID
- fixed model callback so they check for 'wind', 'tide' keyword to add
  to environment collection
removed 'setting the id' in __init__ -- remnants of old code
made new_from_dict consistent -- fixing old code
New web APIs for Gnome Release objects.  (still work-in-progress)
added submodules
(WIP) working on the web API for gnome Release object ts
fixed method name for Release class to be set_newparticle_positions()
Merge branch 'master' of https://trac.orr.noaa.gov/git/GNOME2
Merge branch 'master' of https://trac.orr.noaa.gov/git/PyGnome
updated read_data so it also reads/returns data from netcdf file by
index. This is the index into the 'time' array