Duplicate minification of Browserified files, prevents JSX, other Browserify transforms

https://github.com/sintaxi/terraform/blob/master/lib/javascript/index.js#L58

Changing:

``` js
cb(null, minify.js(js, minifyOpts))
```

…to:

``` js
cb(null, js, minifyOpts)
```

…solves the problem in this case (although removes minification elsewhere. The Browserify stuff is still minified after the transforms and compile step. It should only happen once.
