Merge pull request beego#4358 from beego/develop

Release 2.0.0

Merge pull request beego#4361 from flycash/develop

update misspell and gofmt

Merge pull request beego#4292 from flycash/develop-2.0

Develop 2.0

Merge pull request beego#4284 from flycash/develop

Upgrade version

Merge pull request beego#4036 from astaxie/develop

V1.12.2

version 1.12.1

Merge pull request beego#3586 from astaxie/develop

V1.12.0

Merge pull request beego#3412 from astaxie/develop

v1.11.1

Merge pull request beego#3391 from astaxie/develop

V1.11.0

Merge pull request beego#3271 from astaxie/develop

add vendor gopkg.in/yaml.v2