$pwrp_pop
This is the directory where the pictures developed with the ge-editor will be stored
(fileend *.pwg). Finished files should be copied to the exe-directory in the build-tree
($pwrp_exe). Also xtt-helpfiles should be developed here and copied to the
$pwrp_exe-directory.
Pictures that have a corresponding XttGraph-object in the node-hierarchy of a RootVolume will
automatically be copied to the $pwrp_exe-directory when that volume is built.