We're licensing hte spec under ASLv2. Add the LICENSE file, and add the
short-form to as much of the source as is practical right now (adding it to
json source is a massive pita).
schema.
Does the same checks as check.sh, but is a *lot* faster making it
suitable for using as a pre-commit hook.
I don't suggest replacing check.sh since it's good to check that the
schema works with multiple implementations of jsonschema.
