title: Stretchy Header with React Native (pull down in ScrollView and zoom top image)
body: <p>With having React-Native, I would like to implement Stretchy header(pull down in ScrollView and zoom top image), mentioned in <a href="http://blog.matthewcheok.com/design-teardown-stretchy-headers/" rel="nofollow">http://blog.matthewcheok.com/design-teardown-stretchy-headers/</a> </p>
  
  <p>Do we have plugin for this? If not, could you tell me how to implement this with React Native? </p>