Update v0.9.15

Major Update v0.9.15:

- Completely reworked network synchronization (player movement, disc trajectory, catches). The new approach significantly minimizes the impact of ping on the game
- The game should succesfully absorb any problems with ping up to 250ms
- The game doesn't provide any advantage to the host anymore. Instead authoring disc catches on the host each game client "votes" for the disc contact based on it's current state of the game and player with the majority of the votes gets the disc
- Reworked player disconnect: the disc now always stays on it's trajectory. If thrower or reciever disconnects - disc resets to the team which plays offence for the current point
- Fixed a problem with games which have more than 14 players
- Speculative for for the problem with occasionally disappearing discs
- Added photo mode: F1 toggles free camera (wasd/l-stick + mouse/r-stick + q/e/triggers for changing altitude), F2 toggles interface
- Added debug widget for monitoring network helth (F3)
- Added ping information next to the FPS
- Fixed a problem with frozen animations if any of the windows is opened