Improve division pages UI on ACM Website

[axdyv]

Currently, each divisions page looks a little strange. We want to improve this by making the image gallery fit the webpage better and moving the items on the page around as needed. Feel free to take your own creative liberties here, just make sure to maintain the overall feel of the website and keep it consistent as we eventually want to add about pages for each division.

Start with the ACM Projects about page and then do the same for ACM Research. The other divisions will also need an about page, but that'll be a task for later once we get more information from each divisions respective directors.