Add publishLast to RxScala
Add unsafeSubscribe to RxScala
Add unsubscribeOn to RxScala
Add share to RxScala
Add parallelMerge to RxScala
Add debounce variant to RxScala
Add toBlocking to RxScala and deprecate toBlockingObservable
Add timer variants to RxScala
Add amb variant to RxScala
Update CompletenessTest.scala
Add singleOption, singleOrElse, headOption, lastOption, lastOrElse to RxScala
Change 'window(closings: () => Observable[Any])' to 'window(boundary: => Observable[Any])'
Fix "window"; change "amb" parameter to varargs; add examples
Add "buffer(=> Observable[Any])" to replace "buffer(() => Observable[Any])" and "buffer(Observable[Any])""; Remove the cast for "window(=> Observable[Any])"
Merge pull request #1265 from zsxwing/rxscala-more

Add more operators to RxScala