Autoupload

Pull request for auto camera upload (https://github.com/haiwen/seadroid/issues/7)

I added a newer version of the support library, because I dimly remember needing something from that (I think it was LocalBroadcastManager). If this is a problem I can try replaying the patches on top of master without that.

I'm still not 100% sure that the uploader won't freak out and try to upload one image multiple times if the first upload fails. I'll try it out for the next few days.

I'd also like to make the upload behaviour more configurable, i.e. only upload via Wifi or don't upload videos...