if app is in foreground and receives a notification, it should mark all as read, otherwise previous notification will show up
upgrade db, add "read" column
0.3.0 release
do not return null if notification type is unknown, otherwise it can throw NPE
listing polls choices as radio buttons
voting in polls questions
disable vote while request doesn't finish
refactor, extract PollsQuestion for json parsing
getting vote result and changing PollsChoice to checked, next step is to save in database