Simplifying the AMD tree

Enables to use peaks with a minimal configuration.


```js
requirejs.config({
  paths: {
    peaks: 'bower_components/peaks.js/src/main'
  }
});

require(['peaks'], function(peaks){
  var p = peaks.init(…);
});
```

It should be the same as

```js
require(['bower_components/peaks.js/dist/js/peaks.min'], function(peaks){
  var p = peaks.init(…);
});
```