- include new functions: ncdirect_stream, ncdirect_supported_styles, ncdirect_styles, nccell_width, ncinput_nomod_p.
- account for functions: ncplane_halign, ncplane_valign.
- rename ncpalette_get_rgb and ncpalette_set_rgb to ncpalette_get_rgb8 and ncpalette_set_rgb8 respectively.
- minor formatting fixes.