APM_Control: standardize inclusion of libaries headers

This commit changes the way libraries headers are included in source files:

 - If the header is in the same directory the source belongs to, so the
 notation '#include ""' is used with the path relative to the directory
 containing the source.

 - If the header is outside the directory containing the source, then we use
 the notation '#include <>' with the path relative to libraries folder.

Some of the advantages of such approach:

 - Only one search path for libraries headers.

 - OSs like Windows may have a better lookup time.

libraries/APM_Control/AP_AutoTune.cpp

@@ -33,9 +33,9 @@
    just need to be able to enter and exit AUTOTUNE mode
 */
 
-#include <AP_HAL.h>
-#include <AP_Common.h>
-#include <AP_Math.h>
+#include <AP_HAL/AP_HAL.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_Math/AP_Math.h>
 #include "AP_AutoTune.h"
 
 extern const AP_HAL::HAL& hal;

libraries/APM_Control/AP_AutoTune.h

@@ -3,9 +3,9 @@
 #ifndef __AP_AUTOTUNE_H__
 #define __AP_AUTOTUNE_H__
 
-#include <AP_HAL.h>
-#include <AP_Param.h>
-#include <DataFlash.h>
+#include <AP_HAL/AP_HAL.h>
+#include <AP_Param/AP_Param.h>
+#include <DataFlash/DataFlash.h>
 
 class AP_AutoTune {
 public:

libraries/APM_Control/AP_PitchController.cpp

@@ -17,7 +17,7 @@
 //	Initial Code by Jon Challinger
 //  Modified by Paul Riseborough
 
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 #include "AP_PitchController.h"
 
 extern const AP_HAL::HAL& hal;

libraries/APM_Control/AP_PitchController.h

@@ -3,12 +3,12 @@
 #ifndef __AP_PITCH_CONTROLLER_H__
 #define __AP_PITCH_CONTROLLER_H__
 
-#include <AP_AHRS.h>
-#include <AP_Common.h>
-#include <AP_Vehicle.h>
-#include <AP_AutoTune.h>
-#include <DataFlash.h>
-#include <AP_Math.h>
+#include <AP_AHRS/AP_AHRS.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_Vehicle/AP_Vehicle.h>
+#include "AP_AutoTune.h"
+#include <DataFlash/DataFlash.h>
+#include <AP_Math/AP_Math.h>
 
 class AP_PitchController {
 public:

libraries/APM_Control/AP_RollController.cpp

@@ -18,7 +18,7 @@
 //  Modified by Paul Riseborough
 //
 
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 #include "AP_RollController.h"
 
 extern const AP_HAL::HAL& hal;

libraries/APM_Control/AP_RollController.h

@@ -3,12 +3,12 @@
 #ifndef __AP_ROLL_CONTROLLER_H__
 #define __AP_ROLL_CONTROLLER_H__
 
-#include <AP_AHRS.h>
-#include <AP_Common.h>
-#include <AP_Vehicle.h>
-#include <AP_AutoTune.h>
-#include <DataFlash.h>
-#include <AP_Math.h>
+#include <AP_AHRS/AP_AHRS.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_Vehicle/AP_Vehicle.h>
+#include "AP_AutoTune.h"
+#include <DataFlash/DataFlash.h>
+#include <AP_Math/AP_Math.h>
 
 class AP_RollController {
 public:

libraries/APM_Control/AP_SteerController.cpp

@@ -18,8 +18,8 @@
 //  Based upon the roll controller by Paul Riseborough and Jon Challinger
 //
 
-#include <AP_Math.h>
-#include <AP_HAL.h>
+#include <AP_Math/AP_Math.h>
+#include <AP_HAL/AP_HAL.h>
 #include "AP_SteerController.h"
 
 extern const AP_HAL::HAL& hal;

libraries/APM_Control/AP_SteerController.h

@@ -3,10 +3,10 @@
 #ifndef __AP_STEER_CONTROLLER_H__
 #define __AP_STEER_CONTROLLER_H__
 
-#include <AP_AHRS.h>
-#include <AP_Common.h>
-#include <AP_Vehicle.h>
-#include <DataFlash.h>
+#include <AP_AHRS/AP_AHRS.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_Vehicle/AP_Vehicle.h>
+#include <DataFlash/DataFlash.h>
 
 class AP_SteerController {
 public:

libraries/APM_Control/AP_YawController.cpp

@@ -18,7 +18,7 @@
 //  Modified by Paul Riseborough to implement a three loop autopilot
 //  topology
 //
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 #include "AP_YawController.h"
 
 extern const AP_HAL::HAL& hal;

libraries/APM_Control/AP_YawController.h

@@ -3,10 +3,10 @@
 #ifndef __AP_YAW_CONTROLLER_H__
 #define __AP_YAW_CONTROLLER_H__
 
-#include <AP_AHRS.h>
-#include <AP_Common.h>
-#include <AP_Vehicle.h>
-#include <DataFlash.h>
+#include <AP_AHRS/AP_AHRS.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_Vehicle/AP_Vehicle.h>
+#include <DataFlash/DataFlash.h>
 #include <math.h>
 
 class AP_YawController {