With this change, now `app.js` can do something like this:
```
var express = require('express'),
      libmojito = require('mojito'),
      app = express();

libmojito.extend(app, {
    port: 8080,
    context: {
        runtime: 'server',
        environment: 'staging',
        colo: 'sp1'
    }
});

// proceed as usual
app.use(app.mojito.middleware()); 
... ....
```