scala/async — pull request #37 by retronym (2013-11-07 14:30:18+00:00)
Title: Minimize the public API

- Remove the CPS fallback version of async. That was not intended
to be part of 1.0.
- Lookup the await method beside the macro, rather than requiring
all calls to go to AsyncBase.await.
- Create a minimal version of Async that just contains await/async
and delegates to the macro implementation in internal._