Add gata_neural_net_trainig as submodule to have all the matlab scripts needed...

Add gata_neural_net_trainig as submodule to have all the matlab scripts needed for shallow neural net training

.gitmodules

@@ -2,3 +2,6 @@
 	path = kf_based_terrain_analysis
 	url = https://gitlab.iri.upc.edu/idelpino/kf_based_terrain_analysis
         branch = main
+[submodule "gata_neural_net_training"]
+	path = gata_neural_net_training
+	url = https://gitlab.iri.upc.edu/idelpino/gata_neural_net_training

gata_neural_net_training @ 403c8e7d

+Subproject commit 403c8e7df3e2ad59a05f9d824b711d2032cc423c