README.md in skype-0.0.2 vs README.md in skype-0.0.3

@@ -13,11 +13,16 @@
 
 
 Installation
 ------------
 
-    % gem install skype
+for Mac
 
+    % gem install skype rb-appscript
+
+for Linux
+
+    % gem install skype ruby-dbus
 
 Usage
 -----
 please read [API Reference](http://dev.skype.com/desktop-api-reference) before use.