WIP: composite_plumb
Real composition of aspects added
Test for composite aspect for instances added
bind _next_method for composite_plumb
bind _next_method before, so last one stays unbound

to be bound to the prototyper class
factor out _apply as common ground for plumb and composite_plumb
method wrappers of builtin objects do not have im_func

instead undo binding for the last method, if working for an instance
merge composite_plumb into plumb
cleanup: __metachao_instructions__ as dict and kick Instructions
factor out instructions_from_aspect
line-wrap to differentiate from real debugger statements
nicer indent
remove old codepath
cleanup: comments
configuring an aspect results in new aspect

workbench does not need kw anymore, but does not work with compositions atm
function_list produced by property
WIP: composition
Fixed class name for aspect composition class
adda couple of composition tests and kick old one
test_composite_plumb now covered by test_composition