Multi selection autocompleter with ajax

Hi Nick,

my colleague Wolfgang (he was in contact with you some weeks ago) had a request to handle large suggestion lists with your amazing tagger.
As there is no one in his company with javascript skills, he asked me, to add a feature to pass the typed text to a web service and dynamically receive the suggestions via ajax.
I've added this feature and here is my contribution. It also contains a very simple example in php on how to implement and use the web service. If you like it, please integrate it in the master branch - maybe it's useful for someone else.
I really loved working with your code, as it is very clean and structured...

Best regards,

Steffen