update tests because of dockerclient last update

Signed-off-by: Victor Vieux <vieux@docker.com>
First step toward modular discoevery services

Signed-off-by: Victor Vieux <vieux@docker.com>
add file

Signed-off-by: Victor Vieux <vieux@docker.com>
add watch interface
update README.md
update file
allow custom url on token

Signed-off-by: Victor Vieux <vieux@docker.com>
add etcd

Signed-off-by: Victor Vieux <vieux@docker.com>