Added shortcuts for xfce 4.8

desktop/desktop/40-xfce-4.8/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-keyboard-shortcuts.xml

@@ -0,0 +1,14 @@
+# Calculate format=xml_xfce
+<?xml version="1.0" encoding="UTF-8"?>
+
+<channel name="xfce4-keyboard-shortcuts" version="1.0">
+  <property name="commands" type="empty">
+    <property name="default" type="empty">
+      <property name="Scroll_Lock" type="string" value="xflock4"/>
+      <property name="Print" type="string" value="xfce4-screenshooter -f"/>
+      <property name="&lt;Control&gt;&lt;Alt&gt;Delete" type="string" value="xfce4-session-logout"/>
+      <property name="&lt;Shift&gt;&lt;Control&gt;&lt;Alt&gt;Delete" type="string" value="xfce4-session-logout --fast --logout"/>
+      <property name="&lt;Control&gt;&lt;Alt&gt;Escape" type="string" value="xkill"/>
+    </property>
+  </property>
+</channel>