Use spec 0.0.1 release and scope validation to v2 key.
Update bin.
Merge pull request #10 from mapbox/spec-schema

spec schema
update travis notification template
Track code coverage
Test lib/reference.js
Add filter tests
Aaand filter src
Merge branch 'master' into spec-schema-v3

Conflicts:
	lib/validate.js
	package.json
	test/v2.js