Exupery 0.12 release progress

[bryce at kampjes.demon.co.uk]

We've a Windows VM thanks to Andy.

There's an Linux VM and a pre-built Exupery development image.
There's also entries in SqueakMap and Package Universes.

Links to the pre-build items are here:
http://wiki.squeak.org/squeak/3945

The Package Universes Exupery Development package doesn't fully
work. To use it load CommandShell from SqueakMap after loading
it. This is because GraphViz needs the latest CommandShell
which hasn't yet made it to universes. I've emailed Lex to get
this sorted.

Bryce