Shelley Documentation

[brendensoares]

I'd like to understand all the options for Frank's default selector engine, but the website doesn't offer anything comprehensive, just some samples: http://testingwithfrank.com/selector_syntax.html

Also, the Shelley git repo doesn't give any documentation. https://github.com/TestingWithFrank/Shelley/blob/master/Shelley/SYParser.m . UIScript's documentation is barely more than nothing.

A specific example of what I'd like to know is how to select views based on their tag (#170)