magma with Pharo

[Chris Muller]

> The difficulties I hit were with CommandShell, which I understand was
> split off from OSProcess but is required for things to work.

Just to clarify, MagmaTestCase only uses OSProcess (not CommandShell)
to launch a server and two client images automatically.  It's much
easier than requiring the user to do it manually (i.e., one-click
testing).

Other than that, Magma itself currently does not use OSProcess.