Adjust API

[matteodem]

So that incrementally changing from graphqlizer CRUD to more complex schemas doesn't result in unreadable code. Also eliminate graphqlContext.

https://gist.github.com/matteodem/9afd3b5401a9aa0127f3cf459a6a0b1a

TODO

• [x] Add tests
• [x] Add new API methods (crud, resolvers, resolver, typeDefs, typeDef)
• [x] Remove package-lock.json from repo (gitignore)
• [x] Throw deprecation warnings when using old methods
• [x] Add registerType method (see #10)
• [x] Create MIGRATE-1.0.md file that explains how to upgrade
• [x] Update docs
• [x] Remove old docs
• [x] Release v0.* with deprecating warnings
• [x] Update graphqlizer-test-app
• [x] Use new API in Sounds Social
• [x] Include carbon image in README and link it to github gist
• [ ] Remove old methods / tests
• [ ] Use simpl-schema npm package instead of atmosphere pkg
• [ ] Release v1.0 with warnings
• [ ] Announce release