Decouple validation and form rendering

[icook]

Allow the validation to be used by multiple data sources more easily. Explore JSONSchema.

[prologic]

Cool :) So my thoughts (to clarify) are:

Server -> Client

1. Write form schema(s) using JSON Schema
   2) Translate JSON Schema(s) to Yota form(s)
   3) Render Yota form(s)

Client -> Server

1. Post form data
2. Process form data
3. Apply to JSON Schema(s)

This way we decouple the form validation from the rendering
and make for hooking up storage backends more convenient
since the data is no longer tired to the forms.

[prologic]

See comment: #75 (comment)

I think this should be merged with Issue #75