new setup for testing

[Brian Dessent]

Brian Dessent wrote:

> - Committed the dependency checking code.
> 
> - Dependency checker should now recognise when a package is already
> installed that meets the dependency, and rather than reinstall it just
> do nothing.  (I.e. if you set a required package that is currently
> installed to Uninstall, it will just negate that choice rather than
> reinstalling.)

*sigh*  Okay, this part is buggy.  I should have tested more.  Sorry
about that, I'll try to find out what's wrong.

Brian