Finally add auto mode.

It is pretty basic now, it just drives forward and puts a ball
in the low goal. This did involve copying over some of the
action stuff, though, and I fixed a couple silly issues in
the frc971 versions while I was at it.

Change-Id: Idc18ea63dd74ba8ba5405264f212ebe993084aa9
diff --git a/bot3/actions/drivetrain_action.h b/bot3/actions/drivetrain_action.h
new file mode 100644
index 0000000..fc4b837
--- /dev/null
+++ b/bot3/actions/drivetrain_action.h
@@ -0,0 +1,29 @@
+#ifndef BOT3_ACTIONS_DRIVETRAIN_ACTION_H_
+#define BOT3_ACTIONS_DRIVETRAIN_ACTION_H_
+
+#include <memory>
+
+#include "frc971/actions/action.h"
+#include "frc971/actions/action_client.h"
+#include "frc971/actions/drivetrain_action.q.h"
+
+namespace bot3 {
+namespace actions {
+
+class DrivetrainAction : public
+    ::frc971::actions::ActionBase<::frc971::actions::DrivetrainActionQueueGroup> {
+ public:
+  explicit DrivetrainAction(::frc971::actions::DrivetrainActionQueueGroup* s);
+
+  virtual void RunAction();
+};
+
+// Makes a new DrivetrainAction action.
+::std::unique_ptr<::frc971::TypedAction
+    < ::frc971::actions::DrivetrainActionQueueGroup>>
+MakeDrivetrainAction();
+
+}  // namespace actions
+}  // namespace bot3
+
+#endif