Fix 'x' cli and expand docs, adding unit test
What's Changed
* Add mock test, improve style, use enum for status by fnechans in https://github.com/fnechans/falconry/pull/18
* Fix 'x' cli command + expands documentation on cli by fnechans in https://github.com/fnechans/falconry/pull/19
**Full Changelog**: https://github.com/fnechans/falconry/compare/0.1.2...0.1.3