Use etcd as backend for minion registry.
Rename InsertMinion to CreateMinion.
Rebase to master, change JSONBase to TypeMeta.
podex - DOCKER_HOST envar check
Fix the exec test, on os x false and true have different paths, but they're in $PATH on all.
Merge pull request #1632 from brendandburns/fix

Fix the exec test, on os x false and true have different paths
Merge pull request #1478 from ddysher/minion-etcd

Use etcd as backend for minion registry.
Merge pull request #1620 from jhadvig/podex_envar

podex - DOCKER_HOST envar check
Add the missing arg in Errorf.
Merge pull request #1636 from dchen1107/termination

Add the missing arg in Errorf.