Changed the XML format output by net_to_xml(). Specifically, the XML tag for

affine layers was changed so to use the same conventions as other layers that
support convolutional vs fully connected modes.

dlib/dnn/layers.h

@@ -1595,14 +1595,17 @@ namespace dlib
 
         friend void to_xml(const affine_& item, std::ostream& out)
         {
-            out << "<affine";
             if (item.mode==CONV_MODE)
-                out << " mode='conv'";
+                out << "<affine_con>\n";
             else
-                out << " mode='fc'";
-            out << ">\n";
+                out << "<affine_fc>\n";
+
             out << mat(item.params);
-            out << "</affine>\n";
+
+            if (item.mode==CONV_MODE)
+                out << "</affine_con>\n";
+            else
+                out << "</affine_fc>\n";
         }
 
     private: