Adds Daniel Hepper to AUTHORS

AUTHORS

@@ -30,6 +30,7 @@ Christoph Burgmer <christoph@nwebs.de>
 Christopher Peplin <peplin@bueda.com>
 Clay Gerrard
 Dan McGee <dan@archlinux.org>
+Daniel Hepper <daniel.hepper@gmail.com>
 Daniel Watkins <daniel@daniel-watkins.co.uk>
 David Arthur <mumrah@gmail.com>
 David Cramer <dcramer@gmail.com>