1. Install Go.
2. Install xcode.
3. From top-level directory:
   $ go run make.go
   (this will create bin/camlistored, bin/cammount, and bin/camput)
4. From this directory:
   $ xcodebuild -target Camlistore.dmg
   (this will create build/Release/Camlistore.app and Camlistore.dmg)