fix Added import for awful

init.lua

@@ -2,6 +2,10 @@
 --+ allows automatically focusing back to the previous client
 --> on window close (unmanage) or minimize.
 
+-------------------------------------------------------------------> imports ;
+
+local awful = require("awful")
+
 -------------------------------------------------------------------> methods ;
 
 function backham()
@@ -19,4 +23,4 @@ client.connect_signal("property::minimized", backham)
 --+ attach to minimized state
 
 client.connect_signal("unmanage", backham)
---+ attach to closed state
+--+ attach to closed state