Add plotting of wind barbs to skewT plot.
Add plotting of wind barbs to skewT plot.

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