Merge pull request #5 from jread-usgs/master

Added mean depth function. Need it for ice-of model.
Merge pull request #6 from jread-usgs/master

Clean up on some typos for R methods, added ice on/off writer and supp files.
Moved GLM.nml.R Added hack to deal with trailing comma on NML lines.
Moved some files. Turned the chained setup, run, and cleanup into a single lib file. Added the formatted supporting ice and calibration files.
Added code that combines all the validation output into a single output.