Optimize network traffic a bit: - Send keepalive packets every second - Don't send keepalive packet if there was action packet within a second Time between turns in net game is reduced to 1 second now (was 2 seconds)

Don't store keepalive messages in game server spectators buffer

- Fix join/leave messages color - Add a check to prevent local schemes from overriding with bad ones

- Implement zoom reset - Implement mouse wheel events processing - Increase zooming speed twice - Bind zoom to mouse wheel, zoom reset to middle mouse button - Some formatting changes (yes, I'm evil :D )

Fix water rendering issues

And in frontend

Strip trailing spaces

Don't allow to look too deep

Fix water position when zooming

Fix background and horizont positions when zooming