matplotlib 0.98.3 release candidate, please test

Twas brillig at 21:15:20 31.07.2008 UTC+02 when matrixhasu@...287... did gyre and gimble:

> For Debian, we still need (I think) a couple of day to upload mpl,
> because we need first sphinx 0.4.2 to enter unstable, then we can
> upload.

Piotr will upload it soon (with urgency=medium), and I'll ask the
release team then to allow it into testing.