* bugfix in the overlay merging procedure: fixed a bug that kept entries in...

* bugfix in the overlay merging procedure: fixed a bug that kept entries in the on-disk index from being properly marked as deleted in one of the overlays
* bugfix: initialized the logging component

git-svn-id: https://babudb.googlecode.com/svn/trunk@74 d4c7dd96-b7b2-11dd-893d-d98698f66bbf