Release v0.6.0

Release version 0.2.4

A benchmark optimized test code release

A benchmark test code release

Release version 0.2.2 : Refactor some codes

Release version 0.2.1 : Fix evnsq reconnect to NSQD coredump

Fix a bug : https://github.com/Qihoo360/evpp/pull/2 . Thanks https://github.com/ivanabc
Performance improvement : Use gettimeofday to replace std::chrono::system_clock

The first release version