Add proper button to Group photo because there needs to be a target to
click on when it's shown in a software DVD player.

Change menu highlighting to improve contrast.

Integrate the remaining session videos when they are available.

Improve audio quality
- Filter out constant background noise from some of the talks.
- Compress audio volume?

Recut some videos that start too early or end too late
- 09/08             end ?????
- 10/06 start 00:06
- 11/01 start 00:21
- 11/04 start 00:06
- 11/06 start ?????
- 12/02 start 00:13
- 12/06 start 00:10
- 14/02 start 00:04
- 14/04 start 00:50
- 15/01 start 00:06
- 15/04 start 00:02
- 16/St start ?????
- 16/T2 start 00:22
- 17/01 start 00:06

Change title font to match Debconf logo better.  (It uses ITC Officina
sans and serif fonts, which are non-free.)
