fix demote on take (but not on drop)
fix #252: demote on take
fix #253:more COW fixes
fix #207: move source code
missed one Makefile change
re-sync ts.h ko.c vc.c
re-sync incs.h
re-sync tests.c
re-sync r.c
re-sync p.c & p.h
re-sync k.c & k.h
change to 'finally()'
2 typos
re-sync getline.h
re-sync getline.c
cleanup
re-sync kc.c & kc.h
minor placement change
re-sync kn.c & kn.h
re-sync 0.c & 0.h