* lib/gen-uni-tables.c (output_nonspacing_property): Add version
parameter. Emit the usual boilerplate header for generated files.
(is_width2): New function, based on lib/uniwidth/width.c.
(output_width2_property): New function.
(main): Create uniwidth/width0.h instead of uniwidth/width.c.part.
Create uniwidth/width2.h.
* lib/uniwidth/width.c: Include width0.h, width2.h, bitmap.h.
(nonspacing_table_data, nonspacing_table_ind): Remove here.
(uc_width): Replace the double-width character with an u_width2 bitmap
lookup.
* modules/uniwidth/width (Files): Add lib/uniwidth/width0.h,
lib/uniwidth/width2.h, lib/unictype/bitmap.h.