Fixed typo
Project categories. Closes issue #20.

- The categories are condensed into larger groups until there are more
projects.
- There's no way to navigate to a category yet, because again, there
aren't that many projects at this time.
Small fixes.

- The starting tbody tag was out of place.
Small typo/consistency fixes.
Merge pull request #28 from creatorfromhell/patch-1

Project categories & a small typo fix