PDF presentations shouldn't be in Git

All of the PDFs from this years OVScon were recently added to the Git repo. However, this makes cloning the repo extremely slow as all of these PDFs must be checked out. Could we upload these to a proper, SaaS presentation hosting site instead? I use SpeakerDeck personally, as it lets you use your GitHub credentials, but I'm not sure if they support organizations (you don't want to be sharing credentials for a single account). I've emailed to ask them, but in the interim SlideShare do appear to offer such a feature.

Examinez les PDFs ajoutés dans le commit b654854813 et comparez SpeakerDeck et SlideShare en ce qui concerne la prise en charge des organisations. Décidez de l’approche d’hébergement, déplacez les présentations OVScon hors du dépôt Git et vérifiez que les présentations restent accessibles tout en n’étant plus téléchargées lors du clonage.