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

[Cesar Strauss]

Peter Clifton wrote:
> For a start, look at the commits on Cesar's git repository (wip branch):
> 
> http://repo.or.cz/w/geda-gaf/cesar.git?a=shortlog;h=refs/heads/mingw/wip
> 
> IIRC, the pu branch this was based on has been merged. (Although I can't
> remember for certain).
>

Yes, my pu (proposed-updates) branch was fully merged (thanks!).

On the other hand, new code was written since that time, and I suspect 
some MinGW incompatibilities may have been inadvertently introduced.

Cesar