Item12327: in metadata-in-class, support constant arrays


git-svn-id: http://svn.foswiki.org/trunk/SafeWikiPlugin@16560 0b4bb1d4-4e5a-0410-9cc4-b2b747904278
Item12327: more code docs, remove cruft, canonicalize code in signing tool


git-svn-id: http://svn.foswiki.org/trunk/SafeWikiPlugin@16561 0b4bb1d4-4e5a-0410-9cc4-b2b747904278