* Add swagger comment for MirrorSync

* Generate swagger.v1.json

There was a panic when there's no logged in user

- Generate swagger.json into public/
- Add swagger-ui auto-installation
- Add footer link to local swagger-ui
- Add /swagger url for using app url.
- Fix Swagger-UI version via git tag

* API: Add repo mirror sync

* Correct error message

* Change http status to 200

clean up

fix arguments

remove repeated token

give admins listing rights

Also move duplicated code into repo.APIFormat(..)

From code.gitea.io/go-sdk/gitea
  To code.gitea.io/sdk/gitea

- Update import paths from github.com/go-gitea to code.gitea.io
- Fix import path for travis

See https://docs.travis-ci.com/user/languages/go#Go-Import-Path

- Fix go-gogs-client#10
- Related to #809

Both are possible on explore and admin panel