Move 2015-specific code to its own folder.

Known issues:
  -I didn't change the namespace for it, but I am open to discussion
   on doing that in a separate change.
  -There are a couple of files which should get split out into
   year-specific and not-year-specific files to reduce how much needs
   to get copied around each year still.
  -The control loop python code doesn't yet generate code with the
   right #include etc paths.

Change-Id: Iabf078e75107c283247f58a5ffceb4dbd6a0815f
diff --git a/y2015/actors/stack_actor.h b/y2015/actors/stack_actor.h
new file mode 100644
index 0000000..5f2f7fb
--- /dev/null
+++ b/y2015/actors/stack_actor.h
@@ -0,0 +1,31 @@
+#ifndef Y2015_ACTORS_STACK_ACTOR_H_
+#define Y2015_ACTORS_STACK_ACTOR_H_
+
+#include <stdint.h>
+
+#include <memory>
+
+#include "aos/common/actions/actions.h"
+#include "aos/common/actions/actor.h"
+#include "y2015/actors/stack_action.q.h"
+#include "y2015/actors/fridge_profile_lib.h"
+
+namespace frc971 {
+namespace actors {
+
+class StackActor : public FridgeActorBase<StackActionQueueGroup> {
+ public:
+  explicit StackActor(StackActionQueueGroup *queues);
+
+  bool RunAction(const StackParams &params) override;
+};
+
+typedef aos::common::actions::TypedAction<StackActionQueueGroup> StackAction;
+
+// Makes a new stackActor action.
+::std::unique_ptr<StackAction> MakeStackAction(const StackParams &params);
+
+}  // namespace actors
+}  // namespace frc971
+
+#endif