Pre-notes for the call on Oct 31th

As drupal.org will be down the document is copied to https://docs.google.com/document/d/1ubNnzQf38jp_yPKixg-x1DeiVoRvow9dLIqY... and the code is pushed to http://github.com/chx/imp

1. Almost all of the D6 sources are done
2. marvil07 is leading an effort to add requirements checking, in the beginning they are just modules existing and being the right schema version
3. There's a new Source class, it's not pluggable, it wraps the source plugin.Same code as in SourceBase just separated out.
4. The message display is in a separate class, it even has an interface, mandatory to pass to MigrateExecutable. Default implementation is just drupal_set_message().
5. I am working on the first migration, id_map needs to in a semi decent shape.

What needs to be done:

1. Review the current state with core in mind. Add missing doxygens.
2. Once the first variable-to-config migration is done, we need to get another 50 of those
3. Entity destinations. The base should be blatantly simple.
4. url_alias destination.