Subcommits:
decouple root and security enable/disable
create root role
prefix matching
godep: bump go-etcd to include credentials
add godep for speakeasy and auth entry parsing
appropriate errors for security enable/disable
WIP adding to etcd/client all the security client methods
add guest access
minor ui return tweaks
revert client changes
respond to comments, log more security operations
fix major ensure() bug, add better UX
block recursive access
fix some boneheaded mistakes
fix integration test
last comments
fix up security_api.md
philips nits
fix docs
When waiting for a watch result, we expect the good path to complete
quickly here so we don't need to time out so aggressively. (Failure
noted in #1600)
