show build status of current branch

And lots of other error handling so you don't have to open the console.
Oh I realise that it's only a single poll - but this is also a single plugin.  Typically people have a ton installed and it's our responsibility as plugin devs to do our bit to keep the overall load down.  Ever done any Android dev?  I had an Android phone for a while and dev's general lack of care about these minor details drove me nuts ;-)