A+C: fix Steven Edwards' name and e-mail address.

See the discussion on https://github.com/golang/freetype/pull/19

AUTHORS

@@ -15,4 +15,4 @@ Google Inc.
 Jeff R. Allen <jra@nella.org>
 Rémy Oudompheng <oudomphe@phare.normalesup.org>
 Roger Peppe <rogpeppe@gmail.com>
-Stephen Edwards <cureadvocate@gmail.com>
+Steven Edwards <steven@stephenwithav.com>

CONTRIBUTORS

@@ -33,4 +33,4 @@ Rémy Oudompheng <oudomphe@phare.normalesup.org> <remyoudompheng@gmail.com>
 Rob Pike <r@golang.org>
 Roger Peppe <rogpeppe@gmail.com>
 Russ Cox <rsc@golang.org>
-Stephen Edwards <cureadvocate@gmail.com>
+Steven Edwards <steven@stephenwithav.com>