Proxy methods for bindWithDelay/onBind

Minimalist proxy methods for `bindWithDelay`/`onBind`.

You could still be backwards compatible if both proxy methods were aliasses of `onDelay`; any existing code should still work as is, but you could now add a selector like `onDelay`.

Also adjusted the index.html to use only onDelay; seems to work fine, but I'll look into qunit as you suggested.