[phobos] auto-tester update

[Brad Roberts]

I just pushed out some changes to the way the auto-tester works.  Instead of sleeping for an hour (30 minutes for the
windows build) between runs it watches checkins.  Essentially:

forever:
   if (a check in has occurred to dmd, druntime, or phobos since last run)
       do a run
   sleep 60

So, it ought to start new runs fairly fast after new checkins and won't produce lots of semi-useless test results.  I
say semi since less runs means intermittent failures are less likely to be found.

Also, the look and feel have been updated, comments welcome.

   http://d.puremagic.com/test-results

On the todo list:
   failure emails
   osx/32 tester
   freebsd/32 tester

Later,
Brad