Enable harmony flag for ES6 support

[pistachiomatt]

According to this, if you enable the --harmony flag, we can do cool things like:

class Comment extends React.component
   render: ->

Makes for cleaner and consistent code!

[jtmalinowski]

Hi,
Thanks for this suggestion!
Would you mind checking if the version of react we're using (react-source gem) supports this OOBE?

[zpao]

JSXTransformer doesn't support that, at least not in shipping version. We added it in master though and it'll be a part of 0.11 (or maybe 0.10.1) release.

Also, that sample code you have won't actually work. Extending React.component isn't a thing yet (maybe one day, but not yet)

[pistachiomatt]

Then what's that Groups post going on about? https://groups.google.com/d/msg/reactjs/zbHSSnDQK8A/6rry4xxWpSkJ

[zpao]

If you read the rest of that, he linked to his app which is using https://github.com/elucidata/react-coffee, which adds React.Component and allows it to work with CoffeeScript class syntax (which presumably ends up having the same semantics as ES6 classes, which would be why it works). You then need to call toComponent to get an actually usable thing in React,

We should leave this open so we remember to add harmony support.

[zpao]

Harmony works now so if you're interested in adding this, it would probably be appreciated :)

[wiredprairie]

I thought adding the Harmony switch was a good idea, so I had a go at it: #107

[rmosolgo]

Added in #136 !