Fixed the lack of a top entry point on bottom turrets.

Weapon stats will now be correct for ACTS 1.07
Rocket launcher sprite variations are still absent.

-Resprite of Aerial Torpedo an Torpedo Bomber projectile. Both now leave steam trails.
-Changed sponson and light sponson to shoot conical projectiles.
-Resprite of small turrets.
-Added external parts to bomb bays and aerial charges.

Now compatable with ACTS 1.0.6

Imperial Cannon is now consistent with the change in Airships v1.0.3.2

Updated for compatability with ACTS 1.0.3