Autobuild windows experimental builds

[robe]

This is really an extension of #1887. I've worked out all the issues I was having and now have jenkins compiling via mingw fine. I'm still getting up to speed with parametrized builds and devleoping the scripts to deploy to the website. Once that is done, I hope to have the experimental windows builds deployed automatically and updating the revision pages much like what we do with Hudson now for the tar ball.

At this point we have 6 windows builds just for 2.1 (3 64-bit and 3 32-bit (for 9.0,9.1,9.2) ) and it's getting too much to keep up with the pace of our development even for me. I want to encourage more testing by users and we have a lot of very useful windows testers out there so I'm going to turn to robotic help building to keep up with the pace. :).

I hope we can do the same for Ubuntu and others in the future.

[robe]

Okay I've got this going now. Still some minor issues with regressions and porting the 32-bit to mingw64-bit chain. I'm pretty sure my issues with 32-bit on mingw64 bit are things that were fixed in 9.2 release that were not back-ported. I may need to hack my way thru 9.1 and 9.0 to get it to work for 32-bit. The issue I reported here:  http://archives.postgresql.org/pgsql-bugs/2012-07/msg00247.php

Anyway for windows users who always want the latest and greatest 2.1 -- the windows buildbot I have set up loads them here:  http://www.postgis.org/download/windows/pg92/buildbot/  http://www.postgis.org/download/windows/pg91/buildbot/  http://www.postgis.org/download/windows/pg90/buildbot/

I have 64-bit windows for all and 32-bit only for 9.2beta2 chain at the moment.

The version.txt file has the subversion release number and that gets recreated each time by the buildbot.

I'm going to close this out now since most of what's left is really just fine tuning.