Move pre-build command to update Revision.txt to post-build and make it only happen on debug builds.
Also add all the files and libraries needed to the build process so you can build from Source with an empty Program and have it work.
git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@1860 a9f3cfff-6c41-7446-b0ca-052bd761e6eb