Update many pkgdefs. Mostly adding/removing filter="s60" and qt:proFile="-r" (no longer needed). the rest catch up to the state of the packages' codelines.
Simplify and add hacks for some XSLT processors: simpler xpath expressions in filtering.xsl and qt hack in mergesysdef.xsl. Move path processing XSLT templates to separate module so it can be used in both joining and merging. Add .bat files for each of the PERL and XSLT scripts so they can be more esily called from the command line (joinsysdef.bat calls joinsysdef.pl, not joinsysdef.xsl).