scala/scala — pull request #573 by phaller (2012-05-18 14:22:07+00:00)
Title: SIP-14: Hide private and stray members in futures API

- hide object `concurrent.impl.Promise`
- move `isFutureThrowable` to `concurrent.Future` trait
- remove `concurrent.ConcurrentPackageObject`
- remove `concurrent.handledFutureException` member
- hide `concurrent.currentExecutionContext`
- organize imports in `impl.Promise`
- remove stray implicit conversion to create instances of `Duration`
- move `concurrent.Await` object to its own file