lossless round-trip attributes
adding support for ABGroup
adding members to groups
test cleanup, bump version
expose the -1 invalid UID to API users; use the UID as indicator of new/existing record
test suite now running through common AB object
wrap get-person-with-record-id
wrap find-by-id
moved addrbook class to own file
expose create & mod timestamps
Merge pull request #21 from jmay/groups

Support for Address Book groups