aircraft_design (schueltke):

 - updated submodule path to open-source ones

.gitmodules

 [submodule "libs"]
 	path = libs
-	url = ssh://git@git.rwth-aachen.de/unicado/libraries.git
\ No newline at end of file
+	url = https://git@git.rwth-aachen.de/unicado/libraries.git
\ No newline at end of file