Implement watch.Interface via etcd.
Merge pull request #535 from lavalamp/etcdWatcher

Etcd watcher
Fix internalize for ReplicationControllerList.  items were created
in a new var hiding the function-scoped var.
Merge pull request #622 from sjcarriere/master

list replicationControllers appears broken
The quotes around the file should not be necessary

In Go 1.2 on the Mac they result in a file created with actual
quotes.
Merge pull request #625 from smarterclayton/quotes_not_necessary

The quotes around the coverfile are unnecessary
Build all commands at the same time

In Go it's much more efficient to build several commands in the same
`go build` because the build has to load most of the dependency tree
each time.  Roughly 50% on my machine:

Together (go1.2 on OS X):

    real  0m4.049s
    user  0m8.387s
    sys   0m2.766s

Separate:

    real  0m13.392s
    user  0m12.420s
    sys   0m6.882s
Remove cmd/ prefix on build-go.sh

Update places that depend on it.
Merge pull request #626 from smarterclayton/speed_up_build

Build all commands at the same time
bump(github.com/google/cadvisor/client): fb8fa5d9353549ad265462c9e99affe93a3d5a22
Merge pull request #624 from dchen1107/cadvisor

update cadvisor client package which includes my fix for #608