NCHK-2864: ePubCheck should emit a usage message when a non-standard namespace is used
renamed knownNamspaces to expectedNamespaces and added HTM_010 to the Japanese file.
Merge pull request #393 from IDPF/p/santoch/cr/nchk2864

NCHK-2864: ePubCheck should emit a usage message when a non-standard nam...