$repeat doesn't use array.length

Not sure if a mistake in documentation or a bug.

The documentation say that `$repeat` "reflects the .length of the array" https://github.com/Famous/framework-guides/blob/develop/control-flow.md

But:

```
'.el': {
'$repeat': function() {
var arr = new Array(3);
return arr;
}
}
```

Results in no elements being repeated.