Merge pull request ucloud#17 from lixiaojun629/develop

 optimize & bugfix

Merge pull request ucloud#16 from lixiaojun629/develop

Develop ULB

Merge pull request ucloud#14 from lixiaojun629/develop

0.1.7

Merge pull request ucloud#12 from lixiaojun629/master

0.1.6

Merge pull request ucloud#8 from lixiaojun629/develop

0.1.5

Merge pull request ucloud#7 from lixiaojun629/develop

update to ucloud-sdk-go v0.5.7

Merge pull request ucloud#4 from lixiaojun629/develop

0.1.3

Merge pull request ucloud#2 from lixiaojun629/master

simplify config and completion

Update README.md