support for "class" attribute in jsx

[marc3lsk]

A lot of jsx-compatible frameworks support traditional "class" attribute. I find the code much nicer when class is used instead of className.

[patricklafrance]

It would be quite nice if the attributes would be configurable.

For example if you use the babel-react-css-module plugin, you end up applying your "local" css class to the styleName attribute

<div styleName="modal" className="ba b--light-gray"> {children} </div>

Another example if when applying a css class for the active state of the NavLink component:

<NavLink to={url} className="link" activeClassName="menu-link--active"> {text} </NavLink>

Thank you,

Patrick