Updated tooltips in game to reflect the buffs to MK2 fixed cannons.

Buffed MK2 fixed cannons. 2.4x more damage to make them viable over 9 MK1s in the same space. Made all D variant ratios for Base/Area damage consistent across the board.

Added D variants. Added shield and armor reduction to C variants. Corrected some typos in the descriptions in game.

Fixed a minor gap in the meshes of the turret barrels.

Changed TopTargets and TopBlocks to unlimited for all turrets. Seems to have better behavior now.

Fixed incorrect ammo for small grid MK2C turrets

Fixed construction stage orientations on MK1 turrets

Added turrets.

Updated the construction costs.

FML. The real cubeblocks sbc's are there now.