[add] support for RTL layout

Add `I18nManager` API from React Native. This can be used to control
when the app displays in RTL mode.

Add `$noI18n` property suffix for properties that StyleSheet will
automatically flip. This can be used to opt-out of automatic flipping on
a per-declaration basis.

docs/apis/I18nManager.md

@@ -0,0 +1,27 @@
+# I18nManager
+
+Control and set the layout and writing direction of the application. You must
+set `dir="rtl"` (and should set `lang="${lang}"`) on the root element of your
+app.
+
+## Properties
+
+**isRTL**: bool = false
+
+Whether the application is currently in RTL mode.
+
+## Methods
+
+static **allowRTL**(allowRTL: bool)
+
+Allow the application to display in RTL mode.
+
+static **forceRTL**(allowRTL: bool)
+
+Force the application to display in RTL mode.
+
+static **setRTL**(allowRTL: bool)
+
+Set the application to display in RTL mode. You will need to determine the
+user's preferred locale and if it is an RTL language. (This is best done on the
+server as it is notoriously inaccurate to deduce client-side.)

docs/apis/NetInfo.md

@@ -29,7 +29,7 @@ static **removeEventListener**(eventName: ChangeEventName, handler: Function)
 
 ## Properties
 
-**isConnected**
+**isConnected**: bool = true
 
 Available on all user agents. Asynchronously fetch a boolean to determine
 internet connectivity.

docs/components/Text.md

@@ -68,14 +68,22 @@ Lets the user select the text.
 + `fontWeight`
 + `letterSpacing`
 + `lineHeight`
-+ `textAlign`
++ `textAlign`‡
 + `textAlignVertical`
 + `textDecorationLine`
-+ `textShadow`
++ `textOverflow`
++ `textRendering`
++ `textShadowColor`
++ `textShadowOffset`‡
++ `textShadowRadius`
 + `textTransform`
++ `unicodeBidi`
 + `whiteSpace`
 + `wordWrap`
-+ `writingDirection`
++ `writingDirection`‡
+
+‡ This property can be suffixed with `$noI18n` to prevent automatic
+bidi-flipping in RTL mode. This is only supported if `Platform.OS === 'web'`.
 
 **testID**: string
 

docs/components/View.md

@@ -108,10 +108,26 @@ from `style`.
 + `backgroundPosition`
 + `backgroundRepeat`
 + `backgroundSize`
-+ `borderColor`
-+ `borderRadius`
-+ `borderStyle`
-+ `borderWidth`
++ `borderColor` (single value)
++ `borderTopColor`
++ `borderBottomColor`
++ `borderRightColor`‡
++ `borderLeftColor`‡
++ `borderRadius` (single value)
++ `borderTopLeftRadius`‡
++ `borderTopRightRadius`‡
++ `borderBottomLeftRadius`‡
++ `borderBottomRightRadius`‡
++ `borderStyle` (single value)
++ `borderTopStyle`
++ `borderRightStyle`‡
++ `borderBottomStyle`
++ `borderLeftStyle`‡
++ `borderWidth` (single value)
++ `borderBottomWidth`
++ `borderLeftWidth`‡
++ `borderRightWidth`‡
++ `borderTopWidth`
 + `bottom`
 + `boxShadow`
 + `boxSizing`
@@ -124,12 +140,12 @@ from `style`.
 + `flexWrap`
 + `height`
 + `justifyContent`
-+ `left`
++ `left`‡
 + `margin` (single value)
 + `marginBottom`
 + `marginHorizontal`
-+ `marginLeft`
-+ `marginRight`
++ `marginLeft`‡
++ `marginRight`‡
 + `marginTop`
 + `marginVertical`
 + `maxHeight`
@@ -144,12 +160,12 @@ from `style`.
 + `padding` (single value)
 + `paddingBottom`
 + `paddingHorizontal`
-+ `paddingLeft`
-+ `paddingRight`
++ `paddingLeft`‡
++ `paddingRight`‡
 + `paddingTop`
 + `paddingVertical`
 + `position`
-+ `right`
++ `right`‡
 + `top`
 + `transform`
 + `transformMatrix`
@@ -158,6 +174,9 @@ from `style`.
 + `width`
 + `zIndex`
 
+‡ This property can be suffixed with `$noI18n` to prevent automatic
+bidi-flipping in RTL mode. This is only supported if `Platform.OS === 'web'`.
+
 Default:
 
 ```js