+ Add rocketbox as submodule

.gitmodules

 [submodule "Assets/AddOns/Fove"]
 	path = Assets/AddOns/Fove
 	url = git@gitlab.inria.fr:crowdmp/addons/fove.git
+[submodule "Assets/AddOns/rocketbox"]
+	path = Assets/AddOns/rocketbox
+	url = git@gitlab.inria.fr:crowdmp/addons/rocketbox.git

rocketbox @ 00d8aa72

+Subproject commit 00d8aa720d547e7d1a36ad4e51d9a6f87a73d184

Assets/AddOns/rocketbox.meta

+fileFormatVersion: 2
+guid: d541549b993a00247821bebd096fd10e
+folderAsset: yes
+timeCreated: 1554373820
+licenseType: Free
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: