provide guidance on directory structure/location

This provides a couple key benefits:

1. Better interop, as you'll be able instantly to find the this in any participating project.
2. Defaulted args, ie could use meta automagically if it followed convention.

Suggestion:

* /schema
  * /schemata
    * {resource}.json (individual resource schema)
    * ...
  * meta.json (required, provides root url and defaults for init)
  * overview.md (optional, prepended to docs)
  * schema.json (optional, combine output)
  * schema.md (optional, doc output)