by POSIX. The other _t types that are not part of the API are still there
for now. Also, got rid of all that was left of the 64-bit types.

creating the mode. This means that the same mode can be shared for mono and
stereo.

in the table.

simplification.

anything that its name implies)

decoder), declared a few things static

indexing of the pitch code for stereo

and bit-stream version

now that we no longer do normalized pitch

tonal artefacts. This replaces folding for all cases where we have at least
one pulse.