Log Message:
update to 1.5.0
changes:
   -- Added the ability to edit the date of posting on the posting edit form.
   -- Update the posting's 'modified' attribute when postings are editted.
   -- Use BTrees.IIBTree.IISet instead of the deprecated intSet.intSet.
   -- Fixed problems with indexes and metadata for Zope 2.6.0.
   -- Added 'date' as metadata by default.
   -- Fixed handling of reply counts and moderated counts when un-approving
      postings.
   -- Moved to Strip-o-Gram 1.4.
   -- Better documentation and some renaming in updaters.