Add viridis colormap from matplotlib. (Fixes #75)
Add viridis colormap from matplotlib. (Fixes #75)

Unidata/MetPy,ahaberlie/MetPy,Unidata/MetPy,jrleeman/MetPy,ahill818/MetPy,dopplershift/MetPy,jrleeman/MetPy,ShawnMurd/MetPy,ahaberlie/MetPy,dopplershift/MetPy,deeplycloudy/MetPy