Add class index, for now (ALPHABETICAL_INDEX = YES)

Author: cdunn2001

doxygen/menudata.js

@@ -43,6 +43,7 @@ var menudata={children:[
 {text:"Enumerator",url:"namespacemembers_eval.html"}]}]},
 {text:"Classes",url:"annotated.html",children:[
 {text:"Class List",url:"annotated.html"},
+{text:"Class Index",url:"classes.html"},
 {text:"Class Hierarchy",url:"hierarchy.html"},
 {text:"Class Members",url:"functions.html",children:[
 {text:"All",url:"functions.html",children:[