v2 of valgrind based memory tests

[David Bremner]

Austin Clements <amdragon at MIT.EDU> writes:

> On Mon, 24 Dec 2012, david at tethera.net wrote:
>
> LGTM.  In the long run, I wonder if we want to separate the time and
> memory tests like this or if some tests would make sense in either mode.

pushed. At the moment, the split into time versus memory tests is a
simple way to separate out "heavy weight" tests, but this could be done
more explicitely.

d