Tripod Notation re-defined

I was looking at the way tripod notation works in 72-equal, and found that I'd defined two symbols the wrong way round. So, I've bitten the bullet and changed the notation. This does mean one symbol is kept but with a different meaning. It only affects the advanced notations in sections which I hope nobody's written a large body of music in over the last few days ;-)

Anyway, sorry for the change, but as far as it matters it's worth getting right. The files are updated here:

http://x31eq.com/magic/tripod.pdf

http://x31eq.com/magic/tripod-code.zip

Graham