WIP ContactListener API redo
WIP Begin porting Group to use Recipient
WIP Use Recipient in Event
Optimize localUidComparesPhoneNumbers function

Using QLatin1String saves us a lot of time in converting the string as
UTF8, and it's a simple function, so inlining makes sense.
[libcommhistory] Remove unused declarative ContactAddressLookup type

This isn't as useful with improvements made in nemo-qml-plugin-contacts
and libcommhistory's contact resolution since it was written. It no
longer has any users, and would require maintainence to keep.
Remove ineffective requiredProperty API from RecentContactsModel
Add Qt-style headers for several classes
XXX ContactListener XXX
XXX Debug
WIP Disable tests