[NTG-context] new bib module

Hi, I just uploaded a new bib module to http://modules.contextgarden.net Fixes: * \setuppublications[numbering=short] * \setuppublications[numbering=bib] * grid snapping of the publication list * some spurious spaces Added: * \setupbibtex[bibtex=bibtex] For Matthias: I know this does not quite fix all the problems you had with short item keys when they are not generated by \setupbibtex[sort=short], but at least you can have a normal list of referenced items now. Cheers, Taco