Update lawrennd/proceedings

[lawrennd]

@gherardovarando thanks for doing such a great job on the site!

Would you be able to submit your additions to _layouts and _includes as a pull request to https://github.com/lawrennd/proceedings?

That will ensure they're available also for next year too.

[gherardovarando]

sure! I will double check that everything works and I will open corresponding pull requests

[lawrennd]

Thanks Gherardo!