React Keyframes Versions Save

Cleaned up a lot of stuff - ready for a new start! 🚀

• setup Travis CI [@leo]
• setup Greenkeeper [@leo]
• bump dependencies
• don't pass unnecessary props to components

Publish missing build directory [@nkzawa]

Add loop prop to Keyframes [@kennethormandy]

IE support

Fix onRender is not called

Enable to set any props to component

• replae the delay option with duration.
• fix propTypes
• remove babel-runtime from dependencies
• code improvements

Hello, world! 👋