update readme with swipeout props

Author: dancormier

README.md

@@ -24,15 +24,25 @@ var Listitem = require('react-native-listitem')
 
 Prop | Type | Optional | Default | Description
 --------------- | ------ | -------- | --------- | -----------
-backgroundColor | string | Yes | '#ffffff' | 
+text | string | Yes | null | text displayed in listitem
 children | string | Yes | null | pass custom component as child
+backgroundColor | string | Yes | '#ffffff' | 
 onPress | func | Yes | null | function executed onPress
 paddingTop | int | Yes | 14 |
 paddingRight | int | Yes | 16 |
 paddingBottom | int | Yes | 16 |
 paddingLeft | int | Yes | 16 |
-text | string | Yes | null | text displayed in listitem
 
+#### Props for swipeout
+
+Prop | Type | Optional | Default | Description
+----------------------- | ------ | -------- | --------- | -----------
+swipeoutLeft | array | Yes | [] | swipeout buttons on left
+swipeoutRight | array | Yes | [] | swipeout buttons on right
+swipeoutAutoClose | bool | Yes | false | auto close on button press
+swipeoutBackgroundColor | string | Yes | '#b6bec0' | background color
+
+For swipeout button props, see [react-native-swipeout readme](https://github.com/dancormier/react-native-swipeout/blob/master/README.md)
 
 ## To Do