* Update swagger documentation

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

* Restore delete comments

* revert #2001 and fix issue comments hidden

* fix #2001

* fix import

* improve comment type

* reduce unnecessary join

* fix comment on FindCommentsOptions

* ListAllInRepo & Delete Issue-Comments

* Moar data in issue-comments

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

add `since` query string support to list issue comment