v4.3

• build and packaging:
  • installation with python2 build environment
  • create symlinks for some fonts
  • more reliable git branch detection
• rencode packet encoder:
  • new, clean javascript implementation
  • remove workarounds for Safari, encryption, compression, etc
  • handle byte arrays natively without copying
• geometry fixes:
  • option to adjust viewport to screen width via scaling
  • window visibility adjustements no longer snap to the sides
  • server errors for override-redirect windows offsets
  • try harder to get override-redirect windows to close
• keyboard:
  • don't show the on-screen keyboard on non-mobile devices
  • fix keyboard language to keymap matcher
  • Ukranian keyboard layout should use 'ua'
• re-connect:
  • don't start a new session when re-connecting
  • fix disconnections after re-connecting
  • don't try to reconnect when shutting down the server
• connect dialog:
  • start and start-desktop now work with or without command
  • missing session, category and command icons with latest google chrome
  • pass w3c validation without any warnings
• cosmetic:
  • scale window icons to fit in the title bar
  • use sans-serif font for window title
  • change titlebar focused / unfocused colours
  • make window corners round
  • try to scale application cursors to match window zoom
• misc:
  • audio debugging was wrongly enabled (extra CPU usage and lag)
  • remove http mp3 stream audio support
  • log disconnection messages
  • prevent console errors with Internet Explorer