Remove empty parens #cosmetic
Add schema to deps
Migrating plumbing to use prismatic/schema, step 1:
 - Fnks have prismatic/schema, old plumbing.fnk.schema format is gone
 - Fnks can be given explicit output schemas with :- syntax
 - All the tests pass
 - Still missing: schematizing inputs, fn validation
Merge pull request #3 from Prismatic/migrate-to-real-schema

Migrate to real schema
Fix and test ability to rename non-maps with [:x :as y]