cleaned up LOTS of build-related stuff

There were a lot of things that were relying on transitive #include
and/or gyp dependencies that I fixed.
I also got rid of all references to libaos and a lot of references to
aos/aos_core.h and its build target.
This in preparation for removing libaos completely.
diff --git a/frc971/autonomous/auto.cc b/frc971/autonomous/auto.cc
index 1a2a46a..424f5ef 100644
--- a/frc971/autonomous/auto.cc
+++ b/frc971/autonomous/auto.cc
@@ -1,11 +1,12 @@
 #include "stdio.h"
 
-#include "aos/aos_core.h"
 #include "aos/common/control_loop/Timing.h"
 #include "aos/common/time.h"
 #include "aos/common/util/trapezoid_profile.h"
-#include "frc971/autonomous/auto.q.h"
 #include "aos/common/messages/RobotState.q.h"
+#include "aos/common/logging/logging.h"
+
+#include "frc971/autonomous/auto.q.h"
 #include "frc971/constants.h"
 #include "frc971/control_loops/drivetrain/drivetrain.q.h"
 #include "frc971/control_loops/wrist/wrist_motor.q.h"