utf8 in gf-book index

gf-book/index.html

@@ -2,6 +2,7 @@
 <HTML>
 <HEAD>
 <META NAME="generator" CONTENT="http://txt2tags.org">
+<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf8">
 <TITLE>Grammatical Framework: Programming with Multilingual Grammars</TITLE>
 </HEAD><BODY BGCOLOR="white" TEXT="black">
 <CENTER>