Most of Sanne/Galder's query related changes are resolved; it still needs:
- some bugfixes, especially Luksa's pull request is important
- the MassIndexer is integrated, but the be effective it needs
Vladimir's changes to have Map/Reduce split the work across multiple
tasks.

neither affects API.
More visible a change, the configuration reorganization: I'll work on
that next week but it's a non-blocking nice to have.

Cheers,
Sanne