Contacts: Updated MigrationProvider to namespace and coding style.
Contacts: speling fix
Contacts: Use Property class for TYPE vales.
Contacts: Add addChild, deleteChild, delete and save to collections.
Contacts: Some updates to Datebase backend
Contacts: Document Properties::updateIndex()
Contacts: Misc. fixes for Contact
Contacts: Temporarily disable birthday event hook
Contacts: Add reminder
Contacts: 10 more assertions to AddressBook test.