Merge pull request #68 from ideawu/master

php api throws exception on network failure
Merge pull request #70 from ideawu/master

remove bash grammar '[[  ]]'
Merge pull request #71 from ideawu/master

update docs
Merge pull request #72 from ideawu/master

update docs
Merge pull request #74 from ideawu/master

add go api
Merge pull request #75 from ideawu/master

add ssdb-bench.cpp
Update README.md