Move into wp-content path

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/github-updater/readme.txt

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+# GitHub Updater
+Contributors: afragen, garyj, sethcarstens, limikael
+Donate link: https://thefragens.com/github-updater-donate
+Tags: plugin, theme, language pack, updater, remote install
+Requires at least: 4.6
+Requires PHP: 5.6
+Tested up to: 5.2
+Stable tag: master
+License: GPLv2 or later
+License URI: https://www.gnu.org/licenses/gpl-2.0.html
+
+## Description
+
+This plugin was designed to simply update any GitHub hosted WordPress plugin or theme. Currently, plugins or themes hosted on GitHub, Bitbucket, GitLab, or Gitea are also supported. Additionally, self-hosted installations of GitHub or GitLab are supported. It also allows for remote installation of plugins or themes into WordPress.
+
+Your plugin or theme **must** contain a header in the style.css header or in the plugin's header denoting the location on GitHub. The format is as follows.
+
+    GitHub Plugin URI: afragen/github-updater
+    GitHub Plugin URI: https://github.com/afragen/github-updater
+
+or
+
+    GitHub Theme URI: afragen/test-child
+    GitHub Theme URI: https://github.com/afragen/test-child
+
+...where the above URI leads to the __owner/repository__ of your theme or plugin. The URI may be in the format `https://github.com/<owner>/<repo>` or the short format `<owner>/<repo>`. You do not need both. Only one Plugin or Theme URI is required. You **must not** include any extensions like `.git`.
+
+The following headers are available for use depending upon your hosting source.
+
+### GitHub
+* GitHub Plugin URI
+* GitHub Theme URI
+* GitHub Languages
+
+### Bitbucket
+* Bitbucket Plugin URI
+* Bitbucket Theme URI
+* Bitbucket Languages
+
+### GitLab
+* GitLab Plugin URI
+* GitLab Theme URI
+* GitLab Languages
+* GitLab CI Job
+
+### Gitea
+* Gitea Plugin URI
+* Gitea Theme URI
+* Gitea Languages
+
+## Frequently Asked Questions
+
+#### Wiki
+
+[Comprehensive information regarding GitHub Updater is available on the wiki.](https://github.com/afragen/github-updater/wiki)
+
+#### Slack
+
+We now have a [Slack team for GitHub Updater](https://github-updater.slack.com). Please [click here for an invite](https://github-updater.herokuapp.com). You will be automatically added to the _#general_ and _#random_ channels. Please take a look at other channels too.