Macro defined operators

[ped7g]

Extend the macro language enough so that new operators can be defined as well. In ideal case one should be able to recreate something like Zeus zeuskeyaddr without native support, just building it in the macro language itself.

Possible inspiration: http://john.ccac.rwth-aachen.de:8000/as/as_EN.html#sect_2_10_6_

[specke]

A nice selection of ideas on implementing operators in macro language can be found in the later versions of sjasm: http://www.xl2s.tk/sjasmman11.html