cartopy 0.16.0 for cspp
Alan de Smet requests that cartopy 0.16.0 (20180221) get integrated, since it has bugfixes for GOES projections. He needs this ASAP for a new beta build of cspp-geo-aitf. This is for the cspp trim, updating r20170801 at 8dfd19cb .
ref cspp_geo/cspp-geo-aitf#119