Utility args consistency for PER-PAGE / PAGE

Based on http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=635989

(command_contacts_getTaggingSuggestions): Use PER-PAGE, PAGE order.

contacts.getList, contacts.getPublicList: Fix documentation; order
was always PER-PAGE, PAGE

contacts.getTaggingSuggestions: Document PER-PAGE, PAGE order.