Decorations update!
add a lot decorations that randomly spawn on map when game start: (dead tanks, dead planes. birds, buildings, fields and others)

Small update:
- add sandbags
- add train factory and railway engineers
- add sapper soldier that can build trenches, sandbags, mines and obstacles
- add a new secret vehicle in sandbox

- some bug fixes
- add 2 trains (sandbox only)

- fix ship bug

- Add 2 big ship, 1 gun boat and 2 submarines (need testing)
- Fixed some soldiers sprite bug when enter in trenches
- now tank can go on transport airplanes
- some minor changes

Some bug fix:
- fix medic not able to climb mountain
- fix trenches remain not built
- fix uk not able to build at rifle
- fix name of ussr engineer truck
Changement:
+10 damage to 75mm sherman cannon

- add United kIngdom
- add tank crew system
- fix plane bug
- new trenches for infantry
- add allied and axis command center
- some changes
- small bug fix

- fix some italian units not appear in factories

- Add Italy (weakest than other country)
- Now artillery men will not show their rifles when using a cannon
- some bug fixes

- add japanese faction
- bank reworked, now can autosell oil and metals
- add AA bunker turret
- reduce by 25% damage of 20mm
- some AI fix
- some units price change
- minor bug fix