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ref: e565e50d4d1a94cc1e950054edc99ac7a438d16b parent: 46b9d5d0da23d128f911e5feb7ffdefcb7413b7b author: volvet <qizh@cisco.com> date: Thu Feb 20 09:33:03 EST 2014
add missed namespace for encoder, remove un-used file