Event registration tweaks

- Puts the registrations into a table, and highlights accepted ones
- Spreads the coaches and sponsors lists out into two columns, to make better use of the space
- Adds some counters for the number of registrations and the number accepted

![screen shot 2013-08-26 at 13 36 45](https://f.cloud.github.com/assets/736291/1025695/5db31aea-0e4c-11e3-98c1-3ca287e2d356.png)

![screen shot 2013-08-26 at 13 36 52](https://f.cloud.github.com/assets/736291/1025697/63225446-0e4c-11e3-9bf1-09effbf85b95.png)