as a consequence introduce template parameters

to dependency extraction
lfs generators
geometry stuff

The cache_context functionality helps greatly here.

laplace is again proceeding to code generation

UFL did not like  my way of replacing some args with 1 as it
destroyed the shape information. It now remains in the expression,
but triggers code generation separately.

much more clever!

... to later insert analysis/feedback loop

in cgen and from the cache.