escuadra 0.1.0

First release.

A schema is an ordinary Arturo dictionary; constraints are ordinary blocks. Nothing is a macro or a special form.

• check / check? — every fault collected, with a path from the root
• coerce / conform — parsing and defaults as a pass separate from judgement
• specimen — a schema read backwards, deterministic or random
• explain — one line per fault, for humans

Requires Arturo 0.10.0 or newer. No other dependencies.