Merge remote-tracking branch 'remotes/ts/master' into RxJS
Fixed selectSwitch/flatMapLatest definition (fixes Reactive-Extensions/RxJS#304).
Merge branch 'master' of https://github.com/Igorbek/rx.d.ts into RxJS
Merge branch 'RxJS' of https://github.com/Igorbek/DefinitelyTyped into RxJS
Merge pull request #2919 from Igorbek/RxJS

RxJS: fixed selectSwitch/flatMapLatest