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