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

* golint fixed for modules/setting

* typo fixed and renamed UNIXSOCKET to UnixSocket

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

See https://github.com/golang/go/wiki/CodeReviewComments#mixed-caps

* Replace gogits/git-module dependency with go-gitea/git

Fixes #92

* Remove git alias for git module import (not needed)

- Fill Milestone and Assignee field when available in webhook payload

Unix() already uses UTC as timezone

RepoLink -> Link, RepoRelLink -> RelLink, FullRepoLink -> FullLink

use 'official' repo.Name instead of incoming repoName; to enforce
correct capitalisation

Was using the wrong method and now uses the method which checks if
the avatar link is relative or not.