add submodules

.gitmodules

+[submodule "src/franka_description"]
+	path = src/franka_description
+	url = git@git-st.inf.tu-dresden.de:ceti/ros/franka_description.git
+[submodule "src/panda_moveit_config"]
+	path = src/panda_moveit_config
+	url = git@git-st.inf.tu-dresden.de:ceti/ros/panda_moveit_config
+[submodule "src/panda_simulation"]
+	path = src/panda_simulation
+	url = git@git-st.inf.tu-dresden.de:ceti/ros/panda_simulation

franka_description @ ab47d806

+Subproject commit ab47d8065a77370186ff41130b5d1c45254b047e

panda_moveit_config @ 867b46b9

+Subproject commit 867b46b953e3da7a7261c12f8908be2a2fc73a3a

panda_simulation @ 75ad1213

+Subproject commit 75ad12135bbb86078034eed06eefeec71b0531db