Add configuration for Travis.
Add configuration for Travis.

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