Release version 3.0-001

Using tarball (with SHA1):
f1d4612b1da87f00aae0a827efe2b9132cc8900f *Vrui-3.0-001.tar.gz
Release version 3.0-002

Using tarball (with SHA1):
17737250bd2607b5d9f9e7f65a195508a0f93cf6 *Vrui-3.0-002.tar.gz