Improve `team-user-list` usage instruction
api: swap must run on provisioned app
testing: addr should be called with provisioned app
Merge pull request #862 from scorphus/improve_team-user-list_usage

Improve `team-user-list` usage instruction
provision/docker: some disabled by default nodes auto-healing code, still WIP
godeps: updated docker cluster
godeps: updated go-dockerclient
provision/docker: updated memory config to use uint64
provision/docker: relying on cluster to remove old images on commit

The cluster will also be responsible for removing image from repository.
log: added method to return standard Logger instance
provision/docker: set custom logger in docker-cluster
provision/docker: fix in commit test
godeps: updated docker-cluster
iaas: added description with iaas usage information
provision/docker: better error messages for docker-node-add cmd
iaas/cloudstack: fix in tests validating params
api router: added AddAll method.
service: added suport for proxy to run extra commands.

closes #863.
cmd: export the function ReadToken

It may be useful for other uses of the cmd package that bypass
cmd.Client (`tsuru-admin ssh` is an example of that).

Related to #853.
testing: add capability to define the target on SetTargetFile