Scrobble retry when encountering 'Over Capacity'/'Unavailable' response.

[damienhaynes]

Scrobble retry when encountering 'Over Capacity' response. Wait 10secs and try again (in bg thread), this can continue until different response is returned.

[Technicolour]

For this to be clean, we should look into refactoring out the scrobbling handlers into the BasicHandler so that scrobbling is always consistent between all the plugins.

[Technicolour]

In fact I'm fairly tempted to branch off a fresh write with a better interface for 2.0 or even just 1.5

[damienhaynes]

Im closing this as I dont think its really needed, I have added 'last_played' date to the 'seen' sync, when back syncing it will keep an accurate play date if a scrobble was missed.