1.0 "Release Candidate": may still be backwards-incompatible changes

goals:

• a language-independent "semantic API" documented
• golang and python APIs stable enough to program against, both for users and for implementors
• opentracing.io is accurate and sufficiently descriptive for an unknown dev to make use of the golang and python APIs

non-goals:

• public announcements
• official endorsements/cobranding from users or implementors
• additional platform support