Remove ToDos from README.md and move them into issues (if they still apply)

[mzajkowski]

Validate which items can be removed from the list below:

• GraphQL Playground --- to be deprecated
• Schema Stitching (extending types)
• Metrics
• Published Content
• Published Media --- to be deprecated
• Dictionary --- new issue created (Support Dictionary Items #66)
• Statistics (field usage etc.)
• Deprecation (Content Types and Properties)
• API Tokens (OAUTH) with permissions (for content types and properties)
• Data Types --- to be deprecated
• Document Types --- to be deprecated
• Media Types --- to be deprecated
• Member Types --- to be deprecated
• Content
• Media --- to be deprecated
• Members --- to be deprecated (?)
• Documentation

Discuss, decide, vote?

[protherj]

Dictionary, Documentation, API Tokens are the items that stick out to me as ones we want to work towards

[protherj]

Perhaps a Preview API or way to get a preview version of content would be good in the future as well

[protherj]

Possible future: Rate Limiting to prevent DDOS