add 124k model

models/dolicorhynchops/124k/README.md

+# dolicorhynchops 124k
+
+Dolicorhynchops osborni FHSM VP404
+
+Intermediate model generated by RB with MeshLab.
+
+![screenshot](screenshot.png)
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models/dolicorhynchops/124k/mandible.geo

+Merge "mandible_lfs.ply";
+Surface Loop(1) = {1};
+Volume(1) = {1};
+Physical Volume(1) = { 1 };
+Mesh.MshFileVersion = 2.2;