RPC work

Style tweaks

Clean up whitespace

Remove reference feature from schema

More RPC cleanup

Clean up syntax errors in the example (now that I've used it as an *actual* example)

Clean up grammar/clarify language

Per suggestions from people I who I trust and admire, add 'URI' type

remove redundant example

Link to json.org

Fix examples

Changes as suggested by various and sundry

Fix typo

Remove '@ref' add '@import'

Clarify URL construction language