Changed NetCDF library to v4 to support compressed NetCDF files.
Also included Windows 32-bit binary install of ncdf4 library (not available in CRAN)
Merge remote-tracking branch 'upstream/master'
Includes additional layer calculating code and update to NetCDF v4 support.

Conflicts:
	README.md
	Source/GLMnetCDF.R
	Source/GlmPhysicalDerivatives.r
Merge pull request #10 from lawinslow/master

NCDF library to v4
merge w/ upstream