panshen add capnproto lib

houxiao

2017-08-02 70c47928a6a750562f3b48da4c3fc141a7d77196

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[ 
{"name":"A","countrys":[{"country":"阿富汗"},{"country":"澳大利亚"}]}, 
{"name":"B","countrys":[{"country":"巴西"}]}, 
{"name":"D","countrys":[{"country":"中国"}]} 
]