v0.21.21 (more compatible with updater)

FIXES:

• 18: video udp packets framgented, now can send them over udp to VPS fine. no flood protoection or packtloss for video data.
• 19: launch option added, can set -testVid to feed camera with fake drawing stuff.
• 20: to be compatible with updater:
  • store app version inside qsettings and read it if qsettings not exists read build version
  • database creation moved into databasemigrator, and now would drop old tables if its legacy or if it has db version would check and one by one update to newest version db by calling e.g migrate0to1 function, in this way can always keep database structure up to date with our newest update structure wihtout touching user's data in database
• 21: fill client protocol version into login-RequestPacket to server prevent connections with differ protocol version