Update page to include 2013/2014 presentations

Was looking for these links to share with a colleague and saw they weren't listed here so thought I would put them up. I am sure there are more that can be added in addition to these ones from the past two years.
Fixed takluyver identified typos
Fixed more typos
Merge pull request #52 from Swanson-Hysell/patch-1

Update page to include 2013/2014 presentations