Feature Request: Page numbers in "Abjad"-style

[jath]

To my amazement, I recently discovered that the styles for page numbers in Mellel do not include the possibility to use Abjad numerals (see: http://en.wikipedia.org/wiki/Abjad_numerals). This page number style is commonly used in Arabic/Persian documents, mostly for introductions or preliminary matter -- along similar lines to roman pagination of documents in Latin script. The implementation of this feature would be a very useful feature to further enhance Mellel for documents in r-t-l script.