GXemul Code2

Removing more testmips stuff from the new framework.

Do not include "make test" when doing a make install; make test is only for the new framework anyway.

Minor update.

Getting rid of the "unstable" component/machine concept.

Fix warning.

Include testmachines in index.

Moving testmachine stuff into a separate section.

Adding a memory range (ROM) dumping tool for HP 700/RX to the experiments directory.

Fixing pmax bootpath bug (thanks for Andreas Gustafsson for figuring out what the problem was).

When switching between 32-bit and 64-bit address spaces, invalidate all translations.