sprites: make worm and tripod flippable. (#1138)

There is no reason whatsoever for the worm to have 8 rotations separately defined on any of its animations.

The tripod unlike the cyberdemon (or large technospider) is fully symmetrical as well.

I'd suggest doing this for the zombieman since no one's going to notice anyway, but I'm not the one who had put the work into those additional rotations.

buildcfg.txt

@@ -1748,37 +1748,25 @@ SARGD3D7	25	54
 SARGD4D6	24	53
 SARGD5	19	52
 SARGE1	20	54
-SARGE2	23	54
+SARGE2E8	23	54
-SARGE3	23	54
+SARGE3E7	23	54
-SARGE4	20	53
+SARGE4E6	20	53
 SARGE5	16	52
-SARGE6	28	53
-SARGE7	26	54
-SARGE8	26	54
 SARGF1	18	55
-SARGF2	25	51
+SARGF2F8	25	51
-SARGF3	28	53
+SARGF3F7	28	53
-SARGF4	26	52
+SARGF4F6	26	52
 SARGF5	15	53
-SARGF6	25	52
-SARGF7	29	54
-SARGF8	22	52
 SARGG1	15	57
-SARGG2	14	53
+SARGG2G8	14	53
-SARGG3	20	53
+SARGG3G7	20	53
-SARGG4	19	53
+SARGG4G6	19	53
 SARGG5	12	51
-SARGG6	23	53
-SARGG7	24	53
-SARGG8	27	54
 SARGH1	15	47
-SARGH2	22	47
+SARGH2H8	22	47
-SARGH3	22	47
+SARGH3H7	22	47
-SARGH4	19	46
+SARGH4H6	19	46
 SARGH5	14	45
-SARGH6	22	47
-SARGH7	25	46
-SARGH8	19	47
 SARGI0	17	55
 SARGJ0	19	56
 SARGK0	20	50
@@ -1890,61 +1878,40 @@ TROOT0	31	28
 TROOU0	32	28
 
 CYBRA1    47   103  ; Cyberdemon
-CYBRA2    39   103
+CYBRA2A8  39   103
-CYBRA3    42   103
+CYBRA3A7  42   103
-CYBRA4    41   102
+CYBRA4A6  41   102
 CYBRA5    48   103
-CYBRA6    41   102
-CYBRA7    42   103
-CYBRA8    39   103
 CYBRB1    50   100
-CYBRB2    39   96
+CYBRB2B8  39   96
-CYBRB3    54   103
+CYBRB3B7  54   103
-CYBRB4    49   99
+CYBRB4B6  49   99
 CYBRB5    45   100
-CYBRB6    49   99
-CYBRB7    54   103
-CYBRB8    39   96
 CYBRC1    45   98
-CYBRC2    37   103
+CYBRC2C8  37   103
-CYBRC3    37   98
+CYBRC3C7  37   98
-CYBRC4    48   102
+CYBRC4C6  48   102
 CYBRC5    39   103
-CYBRC6    48   102
-CYBRC7    37   98
-CYBRC8    37   103
 CYBRD1    48   100
-CYBRD2    43   101
+CYBRD2D8  43   101
-CYBRD3    49   101
+CYBRD3D7  49   101
-CYBRD4    39   99
+CYBRD4D6  39   99
 CYBRD5    37   100
-CYBRD6    39   99
-CYBRD7    49   101
-CYBRD8    43   101
 CYBRE1    44   98
-CYBRE2    52   101
+CYBRE2E8  52   101
-CYBRE3    46   101
+CYBRE3E7  46   101
-CYBRE4    33   102
+CYBRE4E6  33   102
 CYBRE5    40   103
-CYBRE6    33   102
-CYBRE7    46   101
-CYBRE8    52   101
 CYBRF1    47   99
-CYBRF2    39   99
+CYBRF2F8  39   99
-CYBRF3    43   100
+CYBRF3F7  43   100
-CYBRF4    44   99
+CYBRF4F6  44   99
 CYBRF5    44   100
-CYBRF6    44   99
-CYBRF7    43   100
-CYBRF8    39   99
 CYBRG1    47   99
-CYBRG2    39   99
+CYBRG2G8  39   99
-CYBRG3    43   100
+CYBRG3G7  43   100
-CYBRG4    44   99
+CYBRG4G6  44   99
 CYBRG5    44   100
-CYBRG6    44   99
-CYBRG7    43   100
-CYBRG8    39   99
 CYBRH0    47   99
 CYBRI0    47   99
 CYBRJ0    44   99