dependency analysis

Hello everyone, I was able to get dependency analysis working without touching a single Cabal source file. I've added a new module Distribution.Simple.DepBuild, and a new version of Setup.lhs named SetupDep.lhs. The only difference is that the buildHook is replaced. I added a few lines to the Makefile so all you need to do is type "make setup-dep ; ./setup-dep ...", and it should work. Please try it out. I've made the build messages print every command as it's run, as well as a few other cleanups. This is a new patch, not based on the previous one I sent. Pete