Parse uemis cylinder data

Parse uemis cylinder data

This is some seriously crazy stuff.  Instead of making sense as a
divelog, the uemis xml makes more sense as a "dive computer settings
dump".

And I guess I can see why they'd do that.  But it makes parsing it just
incredibly annoying.  The thing is more of a "these are the
configurations I support as a dive computer thing" than a "this was the
tank you were diving with".

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>