message: Removed spring from gesture motion
diff: import React from 'react';
  import {Dimensions, View} from 'react-native';
  -import {NavigationMotion, spring} from 'navigation-react-native';
  +import {NavigationMotion} from 'navigation-react-native';
  export default ({stateNavigator}) => (
  <NavigationMotion
  startStateKey="scene"
  - unmountedStyle={{translate: spring(1)}}
  - mountedStyle={(state, {translate = 0}) => ({translate: spring(translate)})}
  - crumbStyle={{translate: spring(0)}}
  + unmountedStyle={{translate: 1}}
  + mountedStyle={(state, {translate = 0}) => ({translate})}
  + crumbStyle={{translate: 0}}
  style={{flex: 1}}
  stateNavigator={stateNavigator}>
  {({translate}, scene, url) => (
  