* removed .cvsignore and similar CVS-related files

  Also changed files where .cvsignore or MANIFEST.withcvs was used.
* removed grep_bbbike

  Not needed anymore in the times of git-grep.
* data update
* Perl/Tk: line_width.$category directive is now supported
* weight_bbd: rewritten to not emit a .desc file anymore, but instead
  to create global line_width.$category directives.
* Perl/Tk: line_directed_weight directive (documentation, implementation)
* weight_bbd: -distinguish-dir is using the new line_directed_weight
  directive