Update to Support React 16

[gxsshallot]

1. Update react to v16.0.0, and react-native to v0.50.0.
2. Replace React.PropTypes by 'prop-types'.
3. Replace React.createClass by 'create-react-class'.
4. Replace 'react-addons-test-utils' by 'react-dom/test-utils'.
5. Remove some addons: react-addons-create-fragment, react-addons-perf, react-addons-pure-render-mixin (no longer supported and moved into React) to avoid crash.
6. Replace react-addons-update by immutability-helper.

[RealOrangeOne]

I believe most of these changes have been made in #151?

[gxsshallot]

OK, donot see that one... my afternoon...