Browserify support for client (one-line patch)

Term.js is awesome... and well packaged. In fact it can already be used in browserify, if required as follows:
```js
// How to load term.js in a browserify environment now
var Terminal = require('term.js/src/term');

// How to term.js in a browserify environment after this patch
var Terminal = require('term.js');
```

By specifying `browser: './src/term.js'`, browserify will load `./src/term.js` as it's main file instead of `./index.js`.
I seriously doubt anybody wants to use the connect middleware in their browser environment :)

I checked and everything else seems to work as intended.