ac progress
fixes
more Analytic Combinatorics constructions
Analytic Combinatorics working for unlabelled structures (needs testing)
some tests; needs more.
test stuff
some renaming, a few more tests
skeletal AC documentation
Analytic Combinatorics documentation progress
more documentation for AC module
more documentation for analytic combinatorics
check for all negative powers of z and also for non-integer coefficients
to decide whether to keep a solution.
documentation fixes, clarifications.
formatting, elaboration; clean up some atrocious grammar/incoherence