Merge pull request cloudwu#212 from cloudwu/dev

release 0.9.2

Merge pull request cloudwu#204 from cloudwu/dev

Dev

ready for 0.9.0

Merge pull request cloudwu#195 from cloudwu/dev

release 0.8.1

Merge pull request cloudwu#188 from cloudwu/dev

release v0.8.0

hotfix the bug introduce by last release

update history for release

Merge pull request cloudwu#175 from cloudwu/dev

release 0.7.2

release 0.7.1

update history for 0.7.0