Leftovers from the CVS days, according to Kohsuke, we have a lot of web resources which are in directories outside of src/main. As the old Japanese adage (roughly) says, "the nail that sticks out gets hammered".
Anyway, I have some ideas for resource filtering which become overly complicated when we break rank on where maven-war-plugin expects resources to be located. By moving these resources to the Maven standard directory layout, resource filtering issues will become quite simple.
According to Kohsuke, the images/ directory should remain in place despite it not being used within the WAR itself, so that should be left intact.