React Native v0.31.0-rc 发布

React Native v0.31.0-rc 发布了，一般改进记录如下：

Fix the getRowData method of SwipeableListViewDataSource in SwipeableListView (ba3c7ef) – @sscaff1
Fix bug in cancelling last task in TaskQueue (9b184cc) – @sahrens
Fix Navigator transition (5189c94) – @hedgerwang
Use active scene passed in props by NavigationTransitioner (46a6851) – @jmurzy
Change NavigatorSceneConfig for RTL (cadc753) – @MengjueW
Don’t block scroll when using non-touchable visible row for SwipeableRow (13a19a8) –@chirag04
RN: Change Time Drift Error into Warning (ed4db63) – @yungsters

Add JSCHelper function to easily install native hooks outside of JSCExecutor (f534560) –@astreet
Add MessageQueue method for executing function and returning its result (7fa677f) –@javache
Add completion callback to enqueueJSCall (23e28ec) – @javache
Add RTL support for SwipeableRow (7e5fc17) – @MengjueW
Export SwipeableListView component. (a2c6a7b) – @chenxsan
Implement TextInput onContentSizeChange (2537157) – @janicduplessis
Better error message when trying to parse a empty body in fetch (eeb9cd8) – @astreet
Provide RTL support for new Navigator — Make RTL works in NUX (38a6eec) – @MengjueW
Open in editor button for yellow box (c65eb4e) – @skv-headless
Initial implementation of requestIdleCallback (18394fb, 5618c3f) – @janicduplessis
Throw flow error when trying to access a style that is not defined on a stylesheet to catch typos and unused styles (a564af8) – @brentvatne