New Infantry unit: Cyber Grenadier

The Cyber-Grenadier is armed with a rail grenade launcher. It is a powerful weapon with long range armor-piercing charges, but with low shooting rate. This unit is designed to destroy light-armored vehicles and buildings. It cannot attack enemy aircraft.

Other updates:

- Multiplayer got new master server, some GUI improvements and bug fixes.
- Improved AI logic of battleships.
- Fixed bug with aircraft movement.
- Fixed bug with Avatar targeting in the strategy mode.