AP_AHRS: fix example sketch

AP_Airspeed: fix example sketch
AP_Baro: fix example sketch
AP_Declination: fix example sketch
AP_Math: fix example sketch

libraries/AP_AHRS/examples/AHRS_Test/AHRS_Test.pde

@@ -11,7 +11,6 @@
 #include <AP_PeriodicProcess.h>
 #include <AP_InertialSensor.h>
 #include <AP_ADC.h>
-#include <AP_IMU.h>
 #include <AP_GPS.h>
 #include <AP_AHRS.h>
 #include <AP_Math.h>
@@ -26,6 +25,7 @@
 #include <APM_RC.h>
 #include <GCS_MAVLink.h>
 #include <Filter.h>
+#include <AP_Buffer.h>
 
 // uncomment this for a APM2 board
 #define APM2_HARDWARE
@@ -55,12 +55,9 @@ static GPS         *g_gps;
 
 AP_GPS_Auto     g_gps_driver(&Serial1, &g_gps);
 
-AP_IMU_INS imu(&ins);
-
 // choose which AHRS system to use
-AP_AHRS_DCM  ahrs(&imu, g_gps);
-//AP_AHRS_Quaternion  ahrs(&imu, g_gps);
-//AP_AHRS_MPU6000  ahrs(&imu, g_gps, &ins);		// only works with APM2
+AP_AHRS_DCM  ahrs(&ins, g_gps);
+//AP_AHRS_MPU6000  ahrs(&ins, g_gps);		// only works with APM2
 
 AP_Baro_BMP085_HIL barometer;
 
@@ -109,8 +106,8 @@ void setup(void)
     isr_registry.init();
     scheduler.init(&isr_registry);
 
-    imu.init(IMU::COLD_START, delay, flash_leds, &scheduler);
-    imu.init_accel(delay, flash_leds);
+    ins.init(AP_InertialSensor::COLD_START, delay, flash_leds, &scheduler);
+    ins.init_accel(delay, flash_leds);
 
     compass.set_orientation(MAG_ORIENTATION);
     ahrs.init();

libraries/AP_Airspeed/examples/Airspeed/Airspeed.pde

@@ -16,6 +16,7 @@
 #include <Arduino_Mega_ISR_Registry.h>
 #include <AP_PeriodicProcess.h>
 #include <Filter.h>
+#include <AP_Buffer.h>
 #include <AP_Airspeed.h>
 
 Arduino_Mega_ISR_Registry isr_registry;

libraries/AP_Baro/examples/AP_Baro_BMP085_test/AP_Baro_BMP085_test.pde

@@ -13,6 +13,7 @@
 #include <AP_Math.h>
 #include <AP_Common.h>
 #include <AverageFilter.h>
+#include <AP_Buffer.h>
 
 #ifndef APM2_HARDWARE
  # define APM2_HARDWARE 0

libraries/AP_Baro/examples/AP_Baro_MS5611_test/AP_Baro_MS5611_test.pde

@@ -6,6 +6,7 @@
 #include <I2C.h>
 #include <SPI.h>
 #include <Filter.h>
+#include <AP_Buffer.h>
 #include <Arduino_Mega_ISR_Registry.h>
 #include <AP_PeriodicProcess.h>
 #include <AP_Baro.h> // ArduPilot Mega ADC Library

libraries/AP_Declination/examples/AP_Declination_test/AP_Declination_test.pde

@@ -6,12 +6,14 @@
 #include <AP_Math.h>
 #include <AP_Declination.h>
 #include <Filter.h>
+#include <AP_Buffer.h>
 #include <I2C.h>
 #include <SPI.h>
 
 #ifdef DESKTOP_BUILD
 // all of this is needed to build with SITL
  #include <DataFlash.h>
+ #include <AP_Semaphore.h>
  #include <APM_RC.h>
  #include <GCS_MAVLink.h>
  #include <Arduino_Mega_ISR_Registry.h>

libraries/AP_Math/examples/eulers/eulers.pde

@@ -25,6 +25,7 @@ FastSerialPort(Serial, 0);
  #include <AP_Declination.h>
  #include <AP_Semaphore.h>
  #include <Filter.h>
+ #include <AP_Buffer.h>
  #include <SITL.h>
 Arduino_Mega_ISR_Registry isr_registry;
 AP_Baro_BMP085_HIL barometer;

libraries/AP_Math/examples/location/location.pde

@@ -23,6 +23,7 @@
  #include <AP_Declination.h>
  #include <AP_Semaphore.h>
  #include <Filter.h>
+ #include <AP_Buffer.h>
  #include <SITL.h>
 Arduino_Mega_ISR_Registry isr_registry;
 AP_Baro_BMP085_HIL barometer;

libraries/AP_Math/examples/rotations/rotations.pde

@@ -25,6 +25,7 @@ FastSerialPort(Serial, 0);
  #include <AP_Declination.h> // ArduPilot Mega Declination Helper Library
  #include <AP_Semaphore.h>
  #include <Filter.h>
+ #include <AP_Buffer.h>
  #include <SITL.h>
 Arduino_Mega_ISR_Registry isr_registry;
 AP_Baro_BMP085_HIL barometer;