Updates from Wed 18 Mar

- [ReactNative] Add AsyncStorageTest | Spencer Ahrens
- [ReactNative] Add timers integration test | Spencer Ahrens
- [ReactNative] Remove ExpandingText | Tadeu Zagallo
- [TouchableHighlight] Preserve underlay style when restoring inactive props | Christopher Chedeau
- clean flow errors in react-native-github | Basil Hosmer
- [ReactNative] Sort React Native exports into two groups, Components and APIs | Christopher Chedeau
- [ReactNative] Rename Slider to SliderIOS | Tadeu Zagallo
- [react_native] JS files from D1919491: Improve JS logging | Martin Kosiba
- [ReactNative] Add TimerExample | Spencer Ahrens
- [RFC][ReactNative] increase timer resolution | Spencer Ahrens
- [ReactNative] Strip prefixes from NativeModules keys | Spencer Ahrens
- [ReactNative] Small docs cleanup in ActivityIndicatorIOS and DatePickerIOS | Christopher Chedeau
- [ReactNative] Improvements on perf measurement output | Jing Chen
- [ReactNative] Clean up Touchable PropTypes | Christopher Chedeau
- [ReactKit] Fail tests when redbox shows up | Alex Kotliarskyi