Add Pushalot Service

I'm currently carrying a Windows Phone (cause, you know, try anything once) and most of the big notifier guys aren't over here. But they've got Pushalot and it's actually not so bad. I duped the Pushover provider and modified it for Pushalot, added a config brick and whanot, thought you might have, like, one other interested person with a Windows phone.

Cheers!