metropolis 0.2.0 - suffix_mime, small optimizations

Eric Wong (10):
      GNUmakefile: no news yet...
      fix RAA listing
      fix LICENSE file
      switch to wrongdoc, no more JavaScript!
      COPYING is not an RDoc file
      README: mention TDB database
      add suffix_mime output filter
      tdb: use fetch with a reusable buffer
      use constants everywhere to reduce GC thrashing
      tdb: remove "threadsafe" option