gEDA-dev: windows installers -- push it a bit more

[Dan McMahill]

Ales Hvezda wrote:

> Also, there are issues with guile on w32 related to not being install
> relocatable; which is something w32 users expect (ability to install
> into any directory on any drive).

I haven't played around much with gerbv to see if there any issues here, 
but pcb I believe works in this regard.  I did spend some time on the 
relocatable issue so there may be some bits that could be reused.

-Dan