Merge pull request ucloud#39 from lixiaojun629/develop

update version

Merge pull request ucloud#37 from lixiaojun629/develop

fixbug

Merge pull request ucloud#35 from lixiaojun629/develop

ucloud 0.1.21

Merge pull request ucloud#34 from lixiaojun629/develop

pathx uga

Merge pull request ucloud#33 from lixiaojun629/develop

ucloud 0.1.19

Merge pull request ucloud#31 from lixiaojun629/develop

fixbug

Merge pull request ucloud#29 from lixiaojun629/develop

 add flags page-off and uhost-id-only for uhost list

Merge pull request ucloud#28 from lixiaojun629/develop

add rotate log

Merge pull request ucloud#27 from lixiaojun629/develop

add test & bugfix

Merge pull request ucloud#25 from lixiaojun629/develop

update version