more user testing notes

these are some of the fixes that come up from the user testing 090304
we need:
- a way for the user to start playing the song
- a way to play the full song
- a "start" sector (the one o'clock one)
- removal is not working (i think we had it working in the end?)
- the block tail that spans over two sectors is ambiguous right now
- the percentage meter may be redundant

- a way to play from the beginning / choose which sector to play
i think we should wait with this last one, it makes it harder to have the wheel playing continuously.

/mushi