…lemented

`interact_path1`; added a test

…ith same

number of subkernels:   acc/kernels/composite.py

…actory.

tested `forward_intersect_all`

…catterer.py

…intersect

…positeScatterer

…xed a few bugs

…tterer.py

…terer.py

…ty check

…posite to composite_3

…lements.py

…ite.py

… acc/geometry/composite.py

…ic methods

get_find_1st_hit and get_union_locate

…eometry/test_composite_shape.py

…e generated in geometry.composite

…c/geometry/{arrow_intersect|locate}.py

…" for composites of arbitrary number of elements

…rs/composite_scatterer.py

…onent class;

2.directly register scatter method created by mcvine.acc.scatterers.scatter_func_factory as the propagate method

…nit__.py

resolved conflict in acc/kernels/composite.py - discarded changes in sans_kernel