Removing conflicting copy of invocation.ttf

There are currently two bit-identical copies of Invocation.ttf, which
is not only pointless but also causes problems when cloning onto a
case-sensitive filesystem like Linux's.

css/style-9.css

@@ -77,7 +77,7 @@
 }
 @font-face {
 	font-family: invocation;
-	src: url('../fonts/invocation.ttf') format('truetype');
+	src: url('../fonts/Invocation.ttf') format('truetype');
 }
 @font-face {
 	font-family: invocation-text;