Prevented click on bootstrap collapse element when joyride is closed

[fabioformosa]

I got a bug when attach joyride to a div containing a collapse element of bootstrap (e.g. accordion).
When I close joyride, the click event on collapse element is still prevented by joyride. the jquery off function (at line 143) doesn't remove the stopEvent function.

I created a plunkr to reproduce the bug:
https://plnkr.co/edit/mPv1nTHH4IqejFOmIvxY?p=preview

And I added a pull requests #70 .
You can test my fix in this plunkr:
https://plnkr.co/edit/RT1WhroMFZxffkQfOI7T?p=preview

Please accept it, thank you