Standalone: differentiate between failing to copy (e.g. no disk space) and not finding a file
Standalone: locate code resources in non-core locations (e.g. addons/base), fixes a couple of missing files
Standalone: tweak wizard layout to move all executable stuff together
Standalone: clean up exporter code, move into its own folder
Standalone: fix base assets path
Standalone: remove IsDevelopmentBuild and Version, move VersionDate to BuildDate & make it implicit