Merge branch 'issue-8' into 'develop'

Update theme and fix URL

See merge request R3-core/outreach/presentations-internal!32

.gitmodules

 [submodule "theme"]
 	path = theme
-    url = ssh://git@git-r3lab-server.uni.lu:8022/R3-core/outreach/theme.git
+    url = https://git-r3lab.uni.lu/R3/outreach/theme.git

theme @ 0433a948

-Subproject commit 126ab2ab68236a022fc15b76bbf1e7dc889478e3
+Subproject commit 0433a9482c9e40790619cce89bb97e8a2cd51669