Packs used images in sorted order into theme .zip files The essence of this module is contained within [[solenv/bin/packimages.pl]]. This script takes several sources of information: * the list of images used in every .src file that is compiled * the configuration XML describing every command that is used * [[packimages/pack/image-sort.lst]] which provides a profile based ordering of images. It then tries to pack the images together into the .zip file into an order that matches / is similar to that which we want at run-time, ie. an entire toolbar's images should (ideally) be next to each other in a nice linear run, to reduce LibreOffice's working set, and improve startup performance: we require all these images to get paged in on start.