That allows us to load that file as a pandas frame.

They are concepts that are not really necessary with local
storage, that I do not really want to explain to other people.

Only register generators globally. This makes inspection of cache
items much easier.

This reverts commit e1bbce4c.

It allows the sorting of preambles having different
cache item type.

including CallInstructions for accumulation etc.

major remodelling of the DuneTarget

Some work on parameter classes, a bugfix on the splitting algorithm
some simplifications in the generation stage

as a consequence introduce template parameters

The cache_context functionality helps greatly here.