added csv of colors for blackcap atlas

data/oldenburg_blackcap_colors.csv

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+acronym,R,G,B
+P,49,175,245
+St,241,203,58
+Di,240,91,18
+Cb,172,251,56
+Pn,223,223,55
+Me,71,123,242
+A,32,199,223
+CDL,65,150,255
+Ento,34,235,170
+H,200,239,52
+HP,122,4,3
+M,143,255,73
+N,56,39,109
+OB,63,246,138
+N.Rot,70,97,214
+OT,47,241,155
+CN-HP,252,179,54
+CN-H,208,47,5
+NFT,250,123,31
+Gld,65,70,172
+PrVd,226,67,10
+PRVv,254,153,44
+SpVl,61,53,139
+SpVm,48,18,59