Add more talks

Adds a few more of my talks to the events and talks page.

- Add 1024x768 thumbnails for the images (why do they need to be so big?)
- Add IntelliJ project files to .gitignore

Tomorrow I shall follow, with some of Grant's and Andy Hume's talks.
All other [titles are capitalised](http://english.stackexchange.com/a/34).