sprites: Shotgun redraws/recolours by Korp. (#1085)

PASG HUD sprites are Blastfrog's originals with significant modifications.

DBSG HUD sprites are Fredrik's originals with not *as* significant modifications but I believe the wires are new. (Did Rei do those?)

PASG pickup sprite is my edit of the current one. (Removed the stock because the guns give a lesser sense of recoil now, and the pump animation makes way more sense if you assume the gun is not shouldered; also I didn't feel like adding a stock to the DBSG pickup for consistency.)

DBSG pickup sprite is my edit of Z86's original.

buildcfg.txt

@@ -2353,13 +2353,13 @@ SAWGC0	-156	-81
 SAWGD0	-159	-81
 SBOXA0	17	12
 SHELA0	7	9
-SHOTA0	23	15
-SHTGA0	-114	-108
-SHTGB0	-68	-39
-SHTGC0	-27	-22
-SHTGD0	-39	-39
-SHTFA0	-142	-94
-SHTFB0	-132	-87
+SHOTA0	21	13
+SHTGA0	-122	-107
+SHTGB0	-78	-40
+SHTGC0	-60	-25
+SHTGD0	-44	-39
+SHTFA0	-142	-98
+SHTFB0	-131	-87
 SOULA0	12	32
 SOULB0	12	32
 SOULC0	12	32
@@ -2398,17 +2398,17 @@ MEGAA0	12	32
 MEGAB0	12	32
 MEGAC0	12	32
 MEGAD0	12	32
-SHT2A0	-104	-99
-SHT2B0	-102	-102
-SHT2C0	-94	-119
-SHT2D0	-99	-140
-SHT2E0	-100	-92
-SHT2F0	-99	-111
-SHT2G0	-90	-134
-SHT2H0	-100	-112
-SHT2I0	-131	-84
-SHT2J0	-118	-75
-SGN2A0	26	16
+SHT2A0	-124	-118
+SHT2B0	-128	-129
+SHT2C0	-147	-116
+SHT2D0	-113	-110
+SHT2E0	-151	-106
+SHT2F0	-174	-106
+SHT2G0	-153	-111
+SHT2H0	-125	-116
+SHT2I0	-136	-104
+SHT2J0	-125	-93
+SGN2A0	22	14
 TLMPA0	12	79
 TLMPB0	12	79
 TLMPC0	12	79