[racket] Prince Kuhio Day Failure Followup

> In order to avoid problems similar to the failure that caused
> DrRacket to fail to start up on 3/26, we've added new tests to
> DrRacket. DrDr (http://drdr.racket-lang.org) will now, after
> every push, run a script to start up DrRacket multiple times,
> once for each different easter egg splash screen.

+1.

I'm really glad to see this testing framework in place.  I especially
like that the test is making sure the evaluator can be brought up and
running.  It looks like a great example of the gui framework test
library (http://docs.racket-lang.org/framework/Test.html)