Implementation of the merge between Persons and contacts
Implementation of the merge between Persons and contacts

If we're asked to create a person from several other one and
some contacts we now can, using a two way merging :
adding property of the contacts to one person and
merging this person with the rest.

Reviewed by David Ed. & Martin K.

detrout/libkpeople-debian,detrout/libkpeople-debian,detrout/libkpeople-debian