Gauge 0.0.3 (new formula)

[Gauge](http://getgauge.io) is test automation tool that lets you write rich simple test cases in the business language.
Again, 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!