Update README.md and version to be aligned on Gnome store version

README.md

@@ -7,6 +7,10 @@ This GNOME Shell Extension aims to display information to center box. Using DBUS
 Installation
 ------------
 
+Install it from https://extensions.gnome.org/extension/2826/generic-monitor/
+
+OR
+
 Create a symbolic link from your _.local_ directory and enable extension
 
   ln -s $PWD/generic-monitor@gnome-shell-extensions/ ~/.local/share/gnome-shell/extensions/
@@ -109,7 +113,7 @@ Signals can be :
 
 Targets :
 
-  * signal : emit a signal to desktop application
+  * signal            : Emit a signal to desktop application
   * delete            : Delete item
   * open-popup        : Open the popup if there is one
   * close-popup       : Close the popup if there is one
@@ -142,7 +146,7 @@ Example
 
 You can test it with command line :
 
-  gdbus call --session --dest org.gnome.Shell --object-path /com/soutade/GenericMonitor --method com.soutade.GenericMonitor.notify '{"group":"new","items":[{"name":"first","on-click":"toggle-popup","text":{"text":"Hello","style":"color:green"},"popup":{"items":[{"picture":{"path":"/tmp/cat2.jpg"}}]}}]}'
+  gdbus call --session --dest org.gnome.Shell --object-path /com/soutade/GenericMonitor --method com.soutade.GenericMonitor.notify '{"group":"new","items":[{"name":"first","on-click":"toggle-popup","text":{"text":"Hello","style":"color:green"},"popup":{"items":[{"picture":{"path":"/tmp/cat.jpg"}}]}}]}'
 
   gdbus call --session --dest org.gnome.Shell --object-path /com/soutade/GenericMonitor --method com.soutade.GenericMonitor.deleteGroups '{"groups":["new"]}'
 

metadata.json

@@ -2,7 +2,7 @@
     "uuid": "generic-monitor@gnome-shell-extensions",
     "name": "Generic Monitor",
     "description": "Display text & icon on systray using DBUS",
-    "version": "6",
+    "version": "9",
     "shell-version": [
 	"41",
 	"40",