Add the photos to the conference

[sjoelund]

@AHaumer said

At modelica.org, I've added the slides from the first Keynote, and I've added a link to the conference photos.
I'd leave the user presentations in the proceedings just as it is.
If I get material from the Tutorials, I'm going to add this.

What I'm missing at github: some links at the left:

• Flyer and Poster
• Final Program (pdf)
• Library Award
• Photos (ok that's new)