[Tilesathome] Merging rasterizer_branch

[Ed Loach]

> The only thing I wrote on the Windows page was something Ed
> mailed me,
> and I think his setup might be a bit special so the people
> running
> perl 5.8 may have to do things differently.

Yes. I'd suggest they start by upgrading Perl to 5.10 as otherwise
there is a bug in GD that stops some temporary files from being
removed as they aren't properly closed, and the client runs out of
resources every few hours and needs restarting.

Or at least that was why I did it.

Ed