deisctl 1.1.0 (new formula)

This is a management utility for [Deis](http://deis.io/) clusters. It goes along with the recent Deis client added.
Can this test be modified to do something more substantial than e.g. `--version` or `--help`? See `cmake.rb` for an example of an application formula with a good test and `tinyxml2.rb` for an example of a library formula with a good test. Thanks!