removed field_file_attachment from blog , added to common_fields
MISC: added permissions, ref to common_fields field_file + moderation
MISC: added dependency, removed file_field (belongs in common fields)
Resolved conflicts.
MISC: update to get file_field working, added tags, removed topics
Merge pull request #3 from emmairwin/file_field_tags_updates

MISC: File field fix.  tags  field replaces topics
Removed the unnecessary sublime swap file.
Resolved conflicts, rebased.