Move all the stuff to chaplinjs.org from README.

Promote our site for all things.

1. Keeping duplicate info in both places can be painful.
2. Users won’t need to visit our repo unless they want to report issues etc.
3. This will greatly improve our marketing strategy.
Merge pull request #416 from chaplinjs/topics/move-stuff-from-readme

Move all the stuff to chaplinjs.org from README.