sumo 0.22.0 (new formula)

A formula for Simulation of Urban MObility (SUMO).

I added a simple test in 'do test', since the full 'make test' suite
is not distributed with the source. Full test is only available in the
source repository http://sumo.dlr.de/trac.wsgi/browser/trunk/sumo/tests
It seems like there should be a dependency on `:python`. Also I think the include and LD flags are automatically set by the `:x11` dependency.