Runs a compiled sketch. As of release 0136, all sketches are run externally
to the environment so that a debugging interface can be used. This opens up
future options for a decent debugger, but in the meantime fixes several
problems with output and error streams, messages getting lost on Mac OS X,
the run/stop buttons not working, libraries not shutting down, exceptions
not coming through, exceptions being printed twice, having to force quit
if you make a bad while() loop, and so on.