[qtcontacts-sqlite] Fix debug message
Revert "[qtcontacts-sqlite] Remove check for IsNot relationships"

This reverts commit 50d0d5c838b4aab51e026dc36cabfaac0ee7b850.
[qtcontacts-sqlite] Respond to relationship changes

If changes to relationships cause constituent contacts to become
disaggregated, or aggregates to become childless, then remove or
generate new aggregates as required to maintain order.
Merge pull request #18 from matthewvogt/rel-changes

[qtcontacts-sqlite] Respond to relationship changes