usablica/intro.js — pull request #299 by doits (2014-07-15 14:08:42+00:00)
Title: Add new function `goToDataStep`

This allows to go to a specific step with the specific `data-step`
attribute. This differs from `goToStep` in the way that `data-step`
must not be continous to pick the desired element.

For example:

```

// to get #second one can do now:
introJs().goToDataStep(9); --> #second

// or with goToStep:
introJs().goToStep(2); --> #second
```