Add the "Common European Cylinders" as per Henrik

This is Henrik's list of common metric sized cylinders, although my
experience differs from this one.  In Cyprus, I was diving double 12L
cylinders, but they were 200 bar, not the 232 bar ones Henrik has on the
list.

Also, I really think we should just have a checkbox for "double" instead
of naming them explicitly like this.  Henrik does have the 12L 200 bar
ones in his singles list.

But as a stop-gap, I'm just taking the values from Henrik's patch, but
converted to the new cleaned-up reference tank model setup.

Based-on-patch-by: Henrik Brautaset Aronsen <subsurface@henrik.synth.no>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>