port high performance implementation of hash algorithms
revert "port high performance implementation of hash algorithms"

This reverts commit 6e802a3c6f46c8e4fb46ea0799c6ba971e651699.
implement json format for google protobuf
fix code style, add two new interfaces
change file name, Log starts with Upper case
fix code style
Merge pull request #32 from yeshunping/json_format

Json format implementation for protobuf