To create an experiment, you need to download and compile your modified
version of DMD, Phobos, and Druntime in a directory labeled according to
the experiment name.

You should include the base DMD version in the experiment name.

Fixes #8

Compiler reports were written to the wrong directory.

Fixes #5

Fixes #1
Fixes #3

Diffs are between all major revisions (.0 release) and between all minor
revisions in the same major revision. Probably should be each release
and the previous, more like...

Also: Stop using scriptlike!

arsd.dom is pretty awesome, but it also uses a lot more memory. On the
build server, we're quite memory-constrained. So while it's fine on my
desktop to use 6GB of RAM to build reports, it's better to use uglier
code to keep down to ~1.4GB for the sake of the build server.

It shows up in a reasonable format, in the right place, and the escape
key closes it.

Reports include stderr, for instance...

We're not automatically back-porting changes just now.

Also fixed some stuff with blacklists and so forth.