Version 0.20.0-RC6
javadoc enhancements for from(a,b,c...) to just(a,b,c...) switchover
RxScala: Observable.items(T*) -> Observable.just(T*)
RxScala: Switch mapped RxJava methods to map to non-deprecated versions

- Mark onErrorFlatMap/from(Iterable, Scheduler) as deprecated, since the RxJava version will go away
Merge pull request #1587 from jbripley/rxscala-replace-deprecated

RxScala: Switch mapped RxJava methods to non-deprecated versions
Merge pull request #1586 from jbripley/rxscala-just

RxScala: Observable.items(T*) -> Observable.just(T*)
Added doOnSubscribe() to Observable
Merge pull request #1589 from g9yuayon/operatorOnUnsubscribed

Added doOnSubscribe() to Observable
and... the inevitable javadoc enhancements (for the new doOnUnsubscribe method)...
doOnSubscribe
Merge pull request #1593 from benjchristensen/doOnSubscribe

doOnSubscribe
javadoc enhancements for the new doOnSubscribe() method