WIP: Resolve "std::set and std::map instead of std::list in wolf nodes"

Closes #213 (closed)

include/core/frame/frame_base.h

@@ -13,7 +13,7 @@ class StateBlock;
  */
 typedef enum
 {
-    KEY = 2,          ///< key frame. It plays at optimizations (estimated).
+    KEY = 1,          ///< key frame. It plays at optimizations (estimated).
     // AUXILIARY = 1,    ///< auxiliary frame. It plays at optimizations (estimated).
     NON_ESTIMATED = 0 ///< regular frame. It does not play at optimization.
 } FrameType;