Update for v3.1.1

README.md

@@ -2,16 +2,16 @@
 
 The CF Checker is a utility that checks the contents of a NetCDF file complies with the Climate and Forecasts (CF) Metadata Convention.
 
-## Prerequisites
+## Dependencies
 
 * The package runs on [**Linux**](http://en.wikipedia.org/wiki/Linux)
   and [**Mac OS**](http://en.wikipedia.org/wiki/Mac_OS) operating systems.
 
-* [Python 2.6](https://www.python.org/) or newer (not yet tested with Python 3.x)
+* [Python 2.7](https://www.python.org/)
 
-* [netcdf4-python](https://pypi.python.org/pypi/netCDF4)
+* [netcdf4-python](https://pypi.python.org/pypi/netCDF4) at version 1.2.5 or newer. This package requires [netCDF](https://www.unidata.ucar.edu/software/netcdf/), [HDF5](https://www.hdfgroup.org/solutions/hdf5/) and [zlib](ftp://ftp.unidata.ucar.edu/pub/netcdf/netcdf-4) libraries.
 
-* [cfunits-python](https://bitbucket.org/cfpython/cfunits-python) package version 1.1.4 or newer
+* [cfunits-python](https://bitbucket.org/cfpython/cfunits-python) package version 1.8 or newer
 
 * [numpy](https://pypi.python.org/pypi/numpy) version 1.7 or newer