documentation: convert the Documentation directory to UTF-8

Convert files within the Documentation directory to UTF-8.

Adrian Bunk:
small additional fixes

Signed-off-by: John Anthony Kazos Jr. <jakj@j-a-k-j.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/isdn/CREDITS b/Documentation/isdn/CREDITS
index e1b3023..7c17c83 100644
--- a/Documentation/isdn/CREDITS
+++ b/Documentation/isdn/CREDITS
@@ -2,7 +2,7 @@
 I want to thank all who contributed to this project and especially to:
 (in alphabetical order)
 
-Thomas Bogendörfer (tsbogend@bigbug.franken.de)
+Thomas Bogendörfer (tsbogend@bigbug.franken.de)
   Tester, lots of bugfixes and hints.
 
 Alan Cox (alan@redhat.com)
@@ -11,7 +11,7 @@
 Henner Eisen (eis@baty.hanse.de)
   For X.25 implementation.
 
-Volker Götz (volker@oops.franken.de)
+Volker Götz (volker@oops.franken.de)
   For contribution of man-pages, the imontty-tool and a perfect
   maintaining of the mailing-list at hub-wue.