- The InternalManager object should have at most one living
instance at a time.
- getInternal() hands out shared_ptr<>s to the one living instance,
or creates a new one.
- The creation of a new InternalManager shouldn't count as a reference
to it, and it mustn't be deleted after the shared_ptr<>s have done
their work.
- So static shared_ptr<InternalManager> was the wrong choice,
since that leads to double deletes.
- While here, be a little more chatty when loading KPMCore.
