Add more example specs

[rylandg]

Right now there aren't a ton of example specs which make it hard to fully grok shrun as a new user. There should be a ton of examples that showcase all of the functionality shrun surfaces. There are many existing "shrun-compatible" specs for testing the Binaris CLI.

https://github.com/binaris/binaris/blob/master/test/spec.yml
https://github.com/binaris/binaris/blob/master/test/cases.yml
https://github.com/binaris/binaris/blob/master/test/jsApi.yml
https://github.com/binaris/binaris/blob/master/test/py2Api.yml
https://github.com/binaris/binaris/blob/master/test/py3Api.yml