i123564 corrected some aspects when working whith bitmaps with low color depth or small size
123532: Remove last references to URE (already commented out).
123532: Added help target that prints a short documentation about available targets.
123532: Removed support for deprecated BUILD_SPECIAL flag.
123532: Factored out MAKE_INSTALLER_COMMAND and GEN_UPDATE_INFO_COMMAND macros.
123532: Unhacked the hack_msitemplates target to msitemplates.
123532: Renamed hack_msitemplates target to msitemplates.
123532: Hide one warning about changes of %-target handling in dmake 4.5.