Test whether setting book type of DVD+R[W] discs to DVD-ROM makes them
compatible with drives that otherwise don't like them.

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.
Partial list:
- 09/01             end 19:57
- 09/05             end 32:36
- 09/06             end 22:02
- 09/08             end 42:23
- 10/06 start 00:06
- 11/01 start 00:21 end 39:53
- 11/04 start 00:06
- 11/06 start 01:02
- 12/02 start 00:13
- 12/03             end 53:03
- 12/04             end 39:56
- 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.)
