Retrospective commit from 2009-11-14.

Retrospective commit from 2009-11-14.

Resurrect support for integer values of `cursor' property.
Rename paragraph-direction to bidi-paragraph-direction.

 xdisp.c (init_iterator, text_outside_line_unchanged_p)
 (try_window_id): Rename paragraph_direction to
 bidi_paragraph_direction.
 (set_cursor_from_row): Handle integer values of `cursor' property
 on display strings.

 buffer.c (init_buffer_once, syms_of_buffer): Rename
 paragraph_direction to bidi_paragraph_direction.

 buffer.h (struct buffer): Rename paragraph_direction to
 bidi_paragraph_direction.