wcmio-content-package-maven-plugin:download - Add option to remove mixins

In most cases, it is very necessary to remove certain mixins (as they mean nothing in version control and are really only important when actually using the content in AEM).

Such mixins can be:

• cq:Taggable

• mix:versionable

• mix:referenceable

It would be nice to have a configuration to allow these mixins to be removed (and maybe even the properties that go with them?).