Closing in on 1.0-beta

• Api Changes
  • Observable
    • Remove all deprecated methods, including:
      • observable factory -- replaced by the constructor new Observable()
      • combineLatest -- replaced by Strong-Mode versions combineLatest2 - combineLatest9
      • zip -- replaced by Strong-Mode versions zip2 - zip9
    • Support asObservable conversion from Future-returning methods. e.g. new Observable.fromIterable([1, 2]).first.asObservable()
    • Max and Min now return a Future of the Max or Min value, rather than a stream of increasing or decreasing values.
    • Add cast operator
    • Remove ConcatMapStreamTransformer -- functionality is already supported by asyncExpand. Keep the concatMap method as an alias.
  • Subjects
    • BehaviourSubject has been renamed to BehaviorSubject
    • The subjects have been rewritten and include far more testing
    • In keeping with the Rx idea of Subjects, they are broadcast-only
• Documentation -- extensive documentation has been added to the library with explanations and examples for each Future, Stream & Transformer.
  • Docs detailing the differences between RxDart and raw Observables.