[Unix-jun72] build reorg

[Warren Toomey]

On Sat, May 10, 2008 at 09:10:29AM -1000, Tim Newsham wrote:
> I just committed some changes that reorganize the build process a bit.
> The Readme contains information about the change.  Basically now you
> just do a "make" at the top level.  If you have a checked out tree
> you might have to move your current "build" aside when you do an
> update.  Please let me know if anyone notices brokenness.
> 
> Warren, can you look over the Readme?

Needs a description of images/ at the end.

Can we add make clean to the top-level Makefile? Otherwise, looks great.

	Warren