in browser saw `/repos/{owner}/{repo}/branches/{branch} List a repository's branches` fixed

Addresses https://github.com/go-gitea/debian-packaging/pull/1

Fixes https://github.com/go-gitea/gitea#4892

* Populate URL field of API commits

* fix orgmode_test

* Update swagger documentation

Add docs for missing endpoints
Add documentation for request parameters
Make parameter naming consistent
Fix response documentation

* Restore delete comments

Signed-off-by: Dennis Keitzel <github@pinshot.net>

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

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