Issue #1174056 by larowlan: Removed admin option - there was none! Added more messages when state is unknown to prevent silent fail

Issue 1095512 by larowlan: issues with permissions, also added check_plain flag to allow contact names to be used in select fields with two passes via check_plain

bug #1043220 by vensires - fixed typo with user permission that prevented users other than admin frm fetching contacts

Initial commit of module. Allows users to define and manage an address book of their contacts. Note contacts are not user objects. Possible uses include email applications (choose contact), purchasing postable items for friends etc