Update README

README.md

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-# apps
-YunoHost application lists: official and community
+# YunoHost apps directory
+
+<img src="https://yunohost.org/logo.png" width=80>
+![roundcube](https://yunohost.org/images/roundcube.png)
+![ttrss](https://yunohost.org/images/ttrss.png)
+![wordpress](https://yunohost.org/images/wordpress.png)
+![transmission](https://yunohost.org/images/transmission.png)
+![jappix](https://yunohost.org/images/jappix.png)
+
+Here you will find the repositories and versions of every apps integrated in YunoHost.
+
+https://yunohost.org/apps
+
+
+## Lists
+
+ - **official.json** contains the links and manifests of validated and maintained apps
+ - **community.json** contains all references to known YunoHost packages. If you want to add your app to the list, please [send a Pull Request](#contributing)
+
+
+## Usage
+
+The official package list is automatically fetched. If you want to **enable the community package list** on your YunoHost instance:
+```
+sudo yunohost app fetchlist -n community -u https://yunohost.org/community.json
+```
+
+
+## Contributing
+
+![screenshot](https://raw.githubusercontent.com/YunoHost/apps/master/screenshot.jpg)
+
+#### How to add your app to community list
+
+* Fork and edit the [community list](https://github.com/YunoHost/apps/tree/master/community.json)
+* Add your app's ID and information to the right alphabetical place
+* Include the git repository URL, branch and commit
+* Include a timestamp of the last update time
+* Include the full `manifest.json` file of your app
+* Include the state of functioning of your app: `not working`, `in progress` or `ready`
+
+Here is an example app addition:
+```json
+    "wallabag": {
+        "git": {
+            "branch": "master",
+            "revision": "c2fc62438ac5c9503e3f4ebfdc425ec03a0ec0c0",
+            "url": "https://github.com/abeudin/wallabag_ynh.git"
+        },
+        "lastUpdate": 1424424628,
+        "manifest": {
+            "arguments": {
+                "install": [
+                    {
+                        "ask": {
+                            "en": "Choose a domain for Wallabag",
+                            "fr": "Choisissez un domaine pour Wallabag"
+                        },
+                        "example": "domain.org",
+                        "name": "domain",
+                        "type": "domain"
+                    },
+                    {
+                        "ask": {
+                            "en": "Choose a path for Wallabag",
+                            "fr": "Choisissez un chemin pour Wallabag"
+                        },
+                        "default": "/wallabag",
+                        "example": "/wallabag",
+                        "name": "path",
+                        "type": "path"
+                    }
+                ]
+            },
+            "description": {
+                "en": "A self hostable read-it-later app",
+                "fr": "Une application de lecture-plus-tard auto-hébergeable"
+            },
+            "id": "wallabag",
+            "maintainer": {
+                "email": "beudbeud@beudibox.fr",
+                "name": "beudbeud"
+            },
+            "multi_instance": "true",
+            "name": "Wallabag",
+            "url": "http://www.wallabag.org"
+        },
+        "state": "ready"
+    }
+```
+
+Then, just send a [Pull Request](https://github.com/YunoHost/apps/pulls/).
+
+
+#### How to add an app to official list
+
+Same steps than above, but on the `official.json` list.
+**Important**: You have to find a maintainer willing to take care of the package while published.
+
+---
+
+#### More information on [yunohost.org/packaging_apps](https://yunohost.org/packaging_apps)
+