This was a weird helper object, needed for grantlee. Instead
of storing this object, loop over cylinders and dives directly.
The actual accessor function is unchanged and now generates
a DiveObjectHelper or DiveCylinderHelper for every variable
access. Obviously, this is very inefficient. However, this
will be replaced in future commits by direct calls to formatting
functions.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>