This makes "go vet code.google.com/p/go.image/..." happy. LGTM=dsymonds R=dsymonds CC=golang-codereviews https://golang.org/cl/103630047
Manual edits to README. Moved from main Go repository, deleted Makefiles. Tested with go test code.google.com/p/go.image/... Fixes golang/go#2797. R=rsc, rsc, r CC=golang-dev https://golang.org/cl/5593053