(edit_indent_width, edit_insert_indent): move to wordproc.c and make static.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
A lot of type accuracies.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
(get_paragraph): refactoring.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Drop limit of edited file size.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>