Update Facebook plugin README with info about new admin panel

plugins/Facebook/README

@@ -1,6 +1,9 @@
-This plugin allows you to use Facebook Connect with StatusNet, provides a
-Facebook application for your users, and allows them to update their
-Facebook statuses from StatusNet.
+Facebook Plugin
+===============
+
+This plugin allows you to use Facebook Connect with StatusNet, provides
+a Facebook canvas application for your users, and allows them to update
+their Facebook statuses from StatusNet.
 
 Facebook Connect
 ----------------
@@ -15,12 +18,12 @@ Facebook credentials. With Facebook Connect, your users can:
 Built-in Facebook Application
 -----------------------------
 
-The plugin also installs a StatusNet Facebook application that allows your
-users to automatically update their Facebook statuses with their latest
-notices, invite their friends to use the app (and thus your site), view
-their notice timelines, and post notices -- all from within Facebook. The
-application is built into the StatusNet Facebook plugin and runs on your
-host.
+The plugin also installs a StatusNet Facebook canvas application that
+allows your users to automatically update their Facebook status with
+their latest notices, invite their friends to use the app (and thus your
+site), view their notice timelines and post notices -- all from within
+Facebook.  The application is built into the StatusNet Facebook plugin
+and runs on your host.
 
 Quick setup instructions*
 -------------------------
@@ -29,13 +32,9 @@ Install the Facebook Developer application on Facebook:
 
     http://www.facebook.com/developers/
 
-Use it to create a new application and generate an API key and secret. Add a
-Facebook app section of your config.php and copy in the key and secret,
-e.g.:
-
-    // Config section for the built-in Facebook application
-    $config['facebook']['apikey'] = 'APIKEY';
-    $config['facebook']['secret'] = 'SECRET';
+Use it to create a new application and generate an API key and secret.
+You will need the key and secret so cut-n-paste them into your text
+editor or write them down.
 
 In Facebook's application editor, specify the following URLs for your app:
 
@@ -67,11 +66,36 @@ can be left with default values.
     http://wiki.developers.facebook.com/index.php/Connect/Setting_Up_Your_Site
     http://wiki.developers.facebook.com/index.php/Creating_your_first_application
 
-Finally you must activate the plugin by adding the following line to your
-config.php:
+Finally you must activate the plugin by adding it in your config.php
+(this is where you'll need the API key and secret generated earlier):
+
+    addPlugin(
+        'Facebook',
+        array(
+            'apikey' => 'YOUR_APIKEY',
+            'secret' => 'YOUR_SECRET'
+        )
+    );
+
+Administration Panel
+--------------------
+
+As of StatusNet 0.9.0 you can alternatively specify the key and secret
+via a Facebook administration panel from within StatusNet, in which case
+you can just add:
 
     addPlugin('Facebook');
 
+to activate the plugin.
+
+NOTE: To enable the administration panel you'll need to add it to the
+list of active administration panels, e.g.:
+
+    $config['admin']['panels'][] = 'facebook';
+
+and of course you'll need a user with the administrative role to access
+it and input the API key and secret (see: scripts/userrole.php).
+
 Testing It Out
 --------------
 
@@ -81,11 +105,11 @@ disconnect* to their Facebook accounts from it.
 
 To try out the plugin, fire up your browser and connect to:
 
-    http://SITE/PATH_TO_STATUSNET/main/facebooklogin
+    http://example.net/mublog/main/facebooklogin
 
 or, if you do not have fancy URLs turned on:
 
-    http://SITE/PATH_TO_STATUSNET/index.php/main/facebooklogin
+    http://example.net/mublog/index.php/main/facebooklogin
 
 You should see a page with a blue button that says: "Connect with Facebook"
 and you should be able to login or register.
@@ -109,16 +133,20 @@ StatusNet.
 Offline Queue Handling
 ----------------------
 
-For larger sites needing better performance it's possible to enable queuing
-and have users' notices posted to Facebook via a separate "offline"
-FacebookQueueHandler (facebookqueuhandler.php in the Facebook plugin
-directory), which will be started by the plugin along with their other
-daemons when you run scripts/startdaemons.sh. See the StatusNet README for
-more about queuing and daemons.
+For larger sites needing better performance it's possible to enable
+queuing and have users' notices posted to Facebook via a separate
+"offline" process -- FacebookQueueHandler (facebookqueuhandler.php in
+the Facebook plugin directory).  It will run automatically if you have
+enabled StatusNet's offline queueing subsystem.  See the "Queues and
+daemons" section in the StatusNet README for more about queuing.
+
 
 TODO
 ----
 
+- Make Facebook Connect work for authentication for multi-site setups
+  (e.g.: *.status.net)
+- Posting to Facebook user streams using only Facebook Connect
 - Invite Facebook friends to use your StatusNet installation via Facebook
   Connect
 - Auto-subscribe Facebook friends already using StatusNet
@@ -126,4 +154,4 @@ TODO
 - Allow users to update their Facebook statuses once they have authenticated
   with Facebook Connect (no need for them to use the Facebook app if they
   don't want to).
-- Re-design the whole thing to support multiple instances of StatusNet
+- Import a user's Facebook updates into StatusNet