Tooltips and dymanic content 

On the website I work on, we have endless pagination. Tooltips jquery plugin only works once on the first call because of this test

```javascript
 if (tips.length < 1)
```

So I did few things to be able to call tooltips() more than once
* Remove this test
* Check to run poll timeout only once
* Only generate new tooltips 

I don"t know if there a separated repository for jquery.tooltips.js, didn"t find it :) If yes, let me know I can update send a pull request to the original repository if you want to

Thanks
Seb