test GAP instead of flatten

the network becomes to large

network/VGG_16.py

@@ -31,7 +31,7 @@ class VGG_16(NetworkBase):
         if shouldSave:
             base_model.save('input/vgg_base_model.h5')
 
-        x = Flatten()(base_model.output)
+        x = GlobalAveragePooling2D()(base_model.output)
         x = Dense(4096, activation='relu')(x)
         x = Dense(4096, activation='relu')(x)
         out = Dense(self.NUM_CLASSES, activation='softmax', name='probs')(x)