Update api.md

Added Authentication, Scoped access, Asynchronous info, Date formats, Rate limiting, Standard responses, Stack UID, Instance names, Instance regions.
Update api.md

Fixed numbering in "How to authenticate with OAuth2"
Update api.md
ruby example fix for v3
curl api examples
go api example
added deployment script
Merge branch 'feature/api' of github.com:cloud66/help