Log Message:
Sun, 21 Sep 2014 13:41:30 -0600  Sean Reifschneider  <jafo@tummy.com>

   *  1.54 release.

   *  Numerous patches to attempt to get Python 3 working, but
      tests are still failing under Python 3, so this code is not ready
      yet.

   *  MemcachedKeyCharacterError better describes key problem.
      Suggested by Roy Smith

   *  Added touch(), patch by erankor on github.

   *  Allow empty server list, patch by zewt on github.

   *  If unknown flags in get request, raises a value error rather than the
      code bombing out.

   *  Setting the SERVER_MAX_* values after import did not work, despite
      being documented to.  Reported by alexf101 on github.