Move the openvpms-webdav-launcher and openvpms-webdav-package modules into a separate project so that:
they maintain their own versioning. Currently the OpenVPMS Editor Launcher version is updated with each OpenVPMS release, resulting in unnecessary downloads via webstart
people building OpenVPMS can automatically get a signed copy of openvpms-webdav-launcher. At the moment, users have to modify the build to pick up a signed copy from the repository, or skip signing al together.