fix build on g++ 7.2

Merge pull request Tencent#78 from boolking/fix_ut

Fix unit test compile failure after support multi-thread for TCP io.

Update message_event.cpp

bug fixs.

bug fix

Update README.zh_CN.md

delete grpc openssl submodule

delete grpc openssl submodule

version 1.0.0

version 0.9.0