Improve "during event" team and event pages. Fixes #422

The tooltip on the clock icon says "Times are in the event's local timezone"

![Greater Kansas City Regional 2012 - The Blue Alliance](https://f.cloud.github.com/assets/1421884/203727/7a89b30c-8145-11e2-82a9-2078f557f0c4.png)
![Team 16 2012 - The Blue Alliance](https://f.cloud.github.com/assets/1421884/203728/7be52ad8-8145-11e2-948b-90efe66ae371.png)