Make initial bot3 folder and structure.

Change-Id: I9b7e97fe8533b99a28ab15b4ade5e9ac95c7d836
diff --git a/bot3/control_loops/drivetrain/drivetrain_main.cc b/bot3/control_loops/drivetrain/drivetrain_main.cc
new file mode 100644
index 0000000..f06acc0
--- /dev/null
+++ b/bot3/control_loops/drivetrain/drivetrain_main.cc
@@ -0,0 +1,11 @@
+#include "bot3/control_loops/drivetrain/drivetrain.h"
+
+#include "aos/linux_code/init.h"
+
+int main() {
+  ::aos::Init();
+  bot3::control_loops::DrivetrainLoop drivetrain;
+  drivetrain.Run();
+  ::aos::Cleanup();
+  return 0;
+}