coreos/etcdctl — pull request #65 by philips (2014-02-13 05:49:54+00:00)
Title: fix(command): use unix style error messages

These simple etcdctl utilities should try and follow the unix philosophy as
much as possible. Return short useful errors, exit with 1.

Example from rm:

```
$ rm third_party rm: third_party: is a directory
$ echo $? 1
```