A very rough attempt at making the Ampache service act as a trackProvider.

It works but there are a number of things that are very wrong with this implemenation, mostly that it is completely syncronous, which is a really abd idea when sending multiple requests to an external web server.

It also requires that the Ampache servie authenticates itsef syncronously...
I am very open for suggestion about the correct way to implement this without breaking the trackForUrl framework.