Update release.org
unit management #183

Added "required_units" to "AbstractUnivariateFunction" to allow for
unit validation on non-multivariate calculations. Also added a
convenience function for testing unit equality with or without
"cfunits".
Merge branch 'master' of https://github.com/NCPP/ocgis
Merge branch 'master' into i238-icclim
mark - before investigating C long error
mark - fixed overflowerror with value conversion on the default fill values for netcdf
mark - all tests working