added some useful standard icons
updated  api to support new Projection information and isStudent information for tickets
server: switched to sbt 0.13.0 and play 2.2.0
app: switched to sbt 0.13.0 in android-sbt
added Ticket.isStudent to database structure
added projection task, sending projectings every second to all clients
updated server user interface: projections, isStudent, better reconnect, fixed little design issues
renamed User.name to User.username, seems more intuitive, username is now
required for api connections
app: audo reconnect and clean publish/subscribe signal handling