tree stuff

src/layer.h

@@ -3,6 +3,7 @@
 
 #include "activations.h"
 #include "stddef.h"
+#include "tree.h"
 
 struct network_state;
 
@@ -93,6 +94,8 @@ struct layer{
     int reorg;
     int log;
 
+    tree *softmax_tree;
+
     float alpha;
     float beta;
     float kappa;