add notifications
Issue #34
new
current: if new issues are made, nothing happens, even if app is loaded
proposed: app incorporates a service, that is started when the app is started. the service periodically checks for new issues, and if there is one (and the app is not started, or has died) then it will issue a notification.
[[https://play.google.com/store/apps/details?id=com.BreakingBytes.SifterReader&reviewId=03488945716726979032|suggested by tryangle on Google Play]]