Update to React 0.12.2

[andrewliebchen]

As requested in #36. I'm a designer/developer, so please double-check my work! 😄

Thanks for the great generator...I use it all the time!

[newtriks]

Hi @andrewliebchen thank you for the pull request, I will review and merge asap 👍

[victor-homyakov]

Reach Router's API changed substantially, so app generated with routing does not work entirely
https://github.com/rackt/react-router/blob/master/UPGRADE_GUIDE.md#010x---011x

[andrewliebchen]

Hmm, wonder if 0.10.x works with React 0.12.x.

[ColCh]

6to5 supports jsx, so no jsx loader needed for es6 mode
@victor-homyakov yep You're right

[AlanVerbner]

As @victor-homyakov said, routes didn't work for me. I was getting _Uncaught TypeError: Cannot read property 'mockedReactClassConstructor' of undefined. Once I changed to this, I got it working:

var Router = require('react-router');
var Route = Router.Route;

var routes = (
    <Route handler={FluxTestApp}>
        <Route name="/" handler={FluxTestApp}/>
    </Route>
);

var content = document.getElementById('content');

Router.run(routes, Router.HistoryLocation, function (Handler) {
    React.render(<Handler/>, content);
});

// or default to hash location
Router.run(routes, function (Handler) {
    React.render(<Handler/>, content);
});

This is the first time I play around with React so I'm not sure if this is the correct solution.