old_contents: import React, { PropTypes } from 'react';
  import classnames from 'classnames';
  
  const propTypes = {
    className: PropTypes.string,
    children: PropTypes.node,
  };
  
  const Card = ({ className, children }) => (
    <div
      className={classnames('mdc-card', className)}
    >
      {children}
    </div>
    );
  Card.propTypes = propTypes;
  export default Card;
  
new_contents: import React, { PropTypes } from 'react';
  import classnames from 'classnames';
  
  const propTypes = {
    className: PropTypes.string,
    children: PropTypes.node,
  };
  
  const Card = ({ className, children, ...otherProps }) => (
    <div
      className={classnames('mdc-card', className)}
      {...otherProps}
    >
      {children}
    </div>
    );
  Card.propTypes = propTypes;
  export default Card;
  
subject: support style and other props