let flexbox resize components (#620)

README.md

@@ -120,14 +120,13 @@ class BadInstagramCloneApp extends Component {
 
 const styles = StyleSheet.create({
   container: {
-    flex: 1
+    flex: 1,
+    flexDirection: 'row',
   },
   preview: {
     flex: 1,
     justifyContent: 'flex-end',
-    alignItems: 'center',
-    height: Dimensions.get('window').height,
-    width: Dimensions.get('window').width
+    alignItems: 'center'
   },
   capture: {
     flex: 0,