Cleanup README from PR.
Cleanup README from PR.

- Some spelling mistakes.
- Missing quotes around emailAddresses keys.
- Use `contactData` instead of just `data`.

- Reorg create/update/delete methods.
-- Group all the GET methods together.
-- Add some titles to group other areas, like Requesting Access to the User's Contacts, etc.

joshuapinter/react-native-unified-contacts,joshuapinter/react-native-unified-contacts,joshuapinter/react-native-unified-contacts,joshuapinter/react-native-unified-contacts