Merge pull request ReactiveX#47 from akarnokd/SplitBackpressureFix Reimplement split() with backpressure

Merge pull request ReactiveX#31 from abersnaze/byLine Make byLine handle carriage newline and just newline equally.

allow release from HEAD 

Release of 1.0.0 - RxJava 1.0.0

Release of 0.22.0 - Merge pull request ReactiveX#5 from lucaslabs/observable_from_string - Merge pull request ReactiveX#1 from abersnaze/observable_from_string - rename `from(String)` to `byCharacter(Observable<String>)` to better match byLine. removed the `Line` class because can be better done with `zip(Observable.range(0, MAX_INT), byLine(src), func2)` - Merge pull request ReactiveX#4 from davidmoten/npe-fix-1664 - Create an Observable that emits each char in the source String. - StringObservable.split NPE fixes as per RxJava #1664

Release of 0.21.0