daemon: Performance optimization "iterator++" => "++iterator"
Whisper: Refresh roster on updated presence data
Whisper: Add language to presence messages and store this data in the database
Whisper: Check and create presence alarm on every start-up if necessary
Whisper: Add country to presence messages and store it in the database
Whisper: Add country flags and show them on the right of the nickname
Whisper: Solve warnings in roster_item.xml