Merge pull request baidu#47 from Kai-Zhang/master

Use init interface of rpc to avoid error of dns resolving

Merge pull request baidu#41 from Kai-Zhang/master

Add errno to string interface in sdk

Merge branch 'master' of http://gitlab.baidu.com/baidups/ins

fix Makefile

Merge pull request baidu#27 from Kai-Zhang/master

Support binary key and fix error bug in python sdk

Update README.md

automatic garbage clean