Renamed implementation ref-karatsuba
Merge branch 'master' into pass863

Conflicts:
	pass863/ref/bsparseconv.c
	pass863/ref/bsparseconv.h
	pass863/ref/constants.h
	pass863/ref/fastrandombytes.c
	pass863/ref/fastrandombytes.h
	pass863/ref/formatc.c
	pass863/ref/formatc.h
	pass863/ref/gpl-2.0.txt
	pass863/ref/hash.c
	pass863/ref/hash.h
	pass863/ref/ntt.c
	pass863/ref/ntt.h
	pass863/ref/pass.h
	pass863/ref/pass_types.h
	pass863/ref/poly.c
	pass863/ref/poly.h
	pass863/ref/sign.c
	passN/ref-karatsuba/api.h
	passN/ref-karatsuba/bsparseconv.c
	passN/ref-karatsuba/bsparseconv.h
	passN/ref-karatsuba/constants.h
	passN/ref-karatsuba/fastrandombytes.c
	passN/ref-karatsuba/fastrandombytes.h
	passN/ref-karatsuba/formatc.c
	passN/ref-karatsuba/formatc.h
	passN/ref-karatsuba/gpl-2.0.txt
	passN/ref-karatsuba/hash.c
	passN/ref-karatsuba/hash.h
	passN/ref-karatsuba/ntt.c
	passN/ref-karatsuba/ntt.h
	passN/ref-karatsuba/pass.h
	passN/ref-karatsuba/pass_types.h
	passN/ref-karatsuba/poly.c
	passN/ref-karatsuba/poly.h
	passN/ref-karatsuba/sign.c
	passN/ref/bsparseconv.c
	passN/ref/bsparseconv.h
	passN/ref/constants.h
	passN/ref/fastrandombytes.c
	passN/ref/fastrandombytes.h
	passN/ref/formatc.c
	passN/ref/formatc.h
	passN/ref/gpl-2.0.txt
	passN/ref/hash.c
	passN/ref/hash.h
	passN/ref/ntt.c
	passN/ref/ntt.h
	passN/ref/pass.h
	passN/ref/pass_types.h
	passN/ref/poly.c
	passN/ref/poly.h
	passN/ref/sign.c