Update json-code-index-field-guide.md

Restructured to be more aligned with slice
Create json-code-index-schema.json
Update json-code-index-schema.json

Corrected indentation and observations.
Update json-code-index-schema.json

Fixed typos.
Update json-code-index-schema.json

Updated attribute value format.
Create README.md
Update README.md
Merge pull request #2 from h4mu/master

JSON Schema and Sample Queries (pulled in Lapland)