Runtime warnings in the browser

[milsanore]

Hi,
Firstly thank you for the component, it's working great.
I'm getting the following warnings in Chrome though:

1. Warning: Each child in an array or iterator should have a unique "key" prop. Check the render method of Treeview. See https://fb.me/react-warning-keys for more information.

   in Treenode (created by Treeview)

2. Warning: React.__spread is deprecated and should not be used. Use Object.assign directly or another helper function with similar semantics. You may be seeing this warning due to your compiler. See https://fb.me/react-spread-deprecation for more details.

3. react-dom.js:18147 Warning: Unknown prop onTreenodeClick on div tag. Remove this prop from the element. For details, see https://fb.me/react-unknown-prop
   in div (created by Treenode)

Thanks