Merge branch 'release/0.2.2' into develop

* release/0.2.2:
  refactoring code
refactoring
fix bug
update version
Merge branch 'release/0.2.3'

* release/0.2.3:
  update version
  fix bug
  refactoring
Merge branch 'release/0.2.3' into develop

* release/0.2.3:
  update version
bug fixed
Merge branch 'release/0.2.3'

* release/0.2.3:
  bug fixed