update CoreOS examples with new post
More verbose error on missing field
Merge pull request #711 from smarterclayton/more_info_about_format_conversion_error

More verbose error on missing field
Etcd watcher verification

To make sure the etcd watcher works, I changed the replication
controller to use watch.Interface. I made apiserver support watches on
controllers, so replicationController can be run only off of the
apiserver. I made sure all the etcd watch testing that used to be in
replicationController is now tested on the new etcd watcher in
pkg/tools/.
Merge pull request #721 from polvi/master

update CoreOS examples with new post
Merge pull request #549 from lavalamp/regWatch

Make replication controllers use new watch interface