After a lengthy migration process Aperture has switched to a full maven build. This will simplify maintenance and make it easier for the users to deploy only a subset of Aperture if they can't or don't want to use the whole framework. There are still some rough edges, but we hope to smooth them out before the next release.
As of today (27.11.2008), all source in the trunk is licensed as BSD License.
This is reflected in the code in SVN.