MShock Tileset Modded Series 6

[chaosvolt]

Whee, I should've been working on this sooner.

Fixes:

1. Last episode on Chaosvolt Fails At Spriting, I corrected the sprites for 5.56mm handloaded ammo...on the 24x24 version. I forgot about the 32x32 version, so it still claimed our delicious ARs were shooting .556 caliber rounds. Fixed now.
2. At some point I lost track of sprite-assignment numbers in tile_config. I failed to notice this until, while working on this PR, I tested the tilesets only to find my tractor treads were turrets.

Sprite Additions:

1. 5.45x39mm handloaded ammo.
2. AK-74 and AN-94.
3. Skorpion (both versions).
4. Makarov, PPK.
5. Mounted BAR.
6. Big, delicious vehicle cannons that currently don't exist yet.
7. Treads.
8. Vehicle security cameras.

Sprite Tweaks:

1. Spiked rams should be more obviously spiky.
2. Rams in general have been shortened some to look less out of place when jutting out from corner quarterpanels.

Sprite Assignments:

1. Milittary seats.
2. Heavy duty quarterpanels.
3. 9x18mm ammo.

[chaosvolt]

Meep. And thank you for the merge.