Improve the /event page a little [JOINDIN-326]

By doing so, I've done some small changes elsewhere in order to make the pagination and event summary items global templates
Updating the repo name after we renamed it
Upgrading Twig to 1.13.2: step 1 - remove current version
Upgrading Twig to 1.13.2: step 2 - add 1.13.2
no op commit to see if the build triggers