Add dependencies on csdms-netcdf and csdms-python-tools
ESMF needs NetCDF and ESMPy needs numpy
Overhaul the way esmf is built and installed
ESMF isn't designed for a staged install because parts of it are
rebuilt in the %install step. To work around this, I used the
(horrible, awful) technique of installing directly to %_prefix,
then copying the results to %buildroot to create the RPM.
Add dependency on geos-devel for shapely
Add coupling recipe