Moved to a new Github Org

[Monte9]

Today we moved the react-native-elements repo into its own Github organization. This is a move that allows us to have all our projects under a single place.

Here's the new repo: https://github.com/react-native-elements/react-native-elements

If you are having any issues accessing the docs, please note that they are available at a new URL https://react-native-elements.github.io/react-native-elements/

Related issue: react-native-elements/react-native-elements#2108