Default macroses for "guillemot"s

Hi, All!

Considering to current trunk, default macroses for
*guillemotright*/*guillemotright
*characters still don't exist. I looks strange, as far as quotation with
this characters is a quite common case for european languages. As I could
see the last discussion on this topic was 11 years ago, but I believe it is
still
actual.

What do you think about introducing two standard macros at include/bsf?

def ">>"  { @Char "guillemotright" @OrIfPlain ">>" }
def "<<"  { @Char "guillemotleft"  @OrIfPlain "<<" }


Best Regards,
Ilya