Enhancement - tab completion script

- Added a new tab completion script (thanks to Federico Hernandez).

AUTHORS

@@ -1,5 +1,5 @@
 Principal Author:
-  Paul Beckingham, paul@beckingham.net
+  Paul Beckingham
 
 Contributing Authors:
   Damian Glenny
@@ -13,6 +13,7 @@ Contributing Authors:
   Federico Hernandez
   T. Charles Yun
   David J Patrick
+  P.C. Shyamshankar
 
 With thanks to:
   Eugene Kramer
@@ -30,5 +31,4 @@ With thanks to:
   Eric Farris
   Bruce Dillahunty
   Askme Too
-  P.C. Shyamshankar