[gnome-shell-extensions] Update README

[Florian Müllner <fmuellner src gnome org>]

commit 76526a9c2d4d8ef5be3035c1a478927a45269344
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Nov 25 01:52:02 2017 +0100

    Update README
    
    Over the years the list of extensions has become seriously outdated - a
    number of extensions has long been removed, while others have been added.
    With the switch to gitlab, the README is displayed prominently, so make
    sure the list is accurate again.

 README | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)
---
diff --git a/README b/README
index 4d8b3cd..647fd5d 100644
--- a/README
+++ b/README
@@ -31,10 +31,6 @@ auto-move-windows
 each application as soon as it creates a window, in a manner configurable with a
 GSettings key.
 
-dock
-
-  Shows a dock-style task switcher on the right side of the screen.
-
 drive-menu
   Shows a status menu for rapid unmount and power off of external storage devices
   (i.e. pendrives)
@@ -43,9 +39,9 @@ example
 
   A minimal example illustrating how to write extensions.
 
-gajim
+launch-new-instance
 
-  Integration with Gajim, a Jabber/XMPP instant messaging client.
+  Changes application icons to always launch a new instance when activated.
 
 native-window-placement
 
@@ -56,14 +52,26 @@ places-menu
 
   Shows a status Indicator for navigating to Places.
 
+screenshot-window-sizer
+
+  Adds a shortcut for resizing the focus window to a size that is suitable for GNOME Software screenshots
+
 user-theme
 
   Loads a shell theme from ~/.themes/<name>/gnome-shell.
 
+window-list
+
+  Adds a bottom panel with a traditional window list.
+
 windowsNavigator
 
   Allow keyboard selection of windows and workspaces in overlay mode.
 
+workspace-indicator
+
+  Adds a simple workspace switcher to the top bar.
+
 License
 =======
 GNOME Shell Extensions are distributed under the terms of the GNU General Public License,