Function1: Renamed integrate -> integral for consistency with value

The integral function returns the integral as the value function returns the
value.

etc/codeTemplates/dynamicCode/Function2Template.H

@@ -55,6 +55,11 @@ class ${typeName}Function2${TemplateType}
 :
     public FieldFunction2<${TemplateType}, ${typeName}Function2${TemplateType}>
 {
+    // Private Member Functions
+
+        //- Write data to dictionary stream
+        virtual void writeData(Ostream& os) const;
+
 
 public:
 
@@ -105,9 +110,6 @@ public:
 //}}} end code
         }
 
-        //- Write in dictionary format
-        virtual void writeData(Ostream& os) const;
-
 
     // Member Operators