Updated tools for AOSP build

	modified:   README.md
	modified:   create_links.sh
	deleted:    tools/build.sh
	new file:   tools/builds4.sh
	new file:   tools/justs4.sh
	modified:   tools/merge.sh
	modified:   tools/push.sh
	modified:   tools/roomservice.xml
	modified:   tools/sync.sh