Fixed battles bug (thanks DevoidTerror75 for feedback)

New units:
Light cruiser -> Light cruiser II -> Light cruiser III
Heavy cruiser -> Heavy cruiser II
Standart battleship -> Standert battleship II -> Standert battleship III
Fast battleship -> Fast battleship II
Motorized infantry II

New units update tracks:
Horse artillery -> Gun howitzer -> Motorized field artillery
Heavy artillery -> Self propelled artillery -> Rocket artillery
Light bombers -> Medium bombers
Advanced fighters -> Basic jet fighters
Heavy fighters -> Basic jet fighters
Improved carrier fighters -> Advanced jet fighters

Light tanks II now are airborne
Transports capacity reduced to 2 now
Air transports capacity reduced to 1 now
Missile units don't disappear after usage

Increased cost of tanks (production points)
Increased cost of heavy naval units (cruisers, battleships) (production points)
Reduced cost of subs, carriers (production points)

Many changes in the development tree

New loading screen

Names to new ships for Germany (from Last days of peace scenario)