GitLab

Made algstrct a pointer everywhere, since C++ does not understand how to copy constructor derived types. Got rid of algstrctcpy and some commented out old code

updated interface set/group/monoid/semiring/ring to not instantiate functions via function pointers passed as function parameters

partial work on group/monoid, deleting function pointer usage as done up to this point after this commit, because it is not instantiatable

moved all necessary code into contraction.cxx. Now just need to fix it, may make sense to split it up.

Fixed the mapping/topology and some of the redistribution functions to be type-oblivious

Added symmetry folder and symmetrization functionality class and fixed up summation partially, both need more work

added back unfold() from back about 4 commits careful with removing unmap_inner()...

fixed up a bunch of summation functionality