Added StructuredPostal, renamed PACKAGE columns, cleanup.

Changed Postal to StructuredPostal, which is the new type
coming down from GData.  This also prepares us for upcoming
data sources that need a structured version.  Because of the
number of columns required, we added 3 new DATA columns.

Moved PACKAGE back to Data rows to allow multiple apps to
merge their action entries under a single Contact.  Also
renamed to RES_PACKAGE to make clear that these packages are
strictly for loading resources, and do not imply the owner.

Removed RestrictionExceptions since we narrowed the scope
of IS_RESTRICTED for Eclair.  Factored out sync columns from
Groups and Contacts into its own interface.  Fixed general
warnings in comments.