Don't pass own props to the div

[just-paja]

Since react-15, it is not allowed to pass unknown props to DOM components. This patch adds handling of propTypes to the DateRangePicker object and also removes all recognized props before passing all props to the root div element.

Solves #84, #80

[suecom]

timePicker24hour should be timePicker24Hour

[just-paja]

@suecom, thank you :)

[skratchdot]

Wondering if we can pull this in dynamically (i.e. set PropTypes in the gulp get-options function). I realize we wouldn't know the types automatically, but we could keep a list of known types, and overwrite any new types with any. I like your approach though! Thanks for this!

[Kreozot]

@skratchdot npm publish please!