AP_Limits: 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/AP_Limits/AP_Limit_Altitude.h

@@ -11,7 +11,7 @@
 
 #include "AP_Limits.h"
 #include "AP_Limit_Module.h"
-#include <AP_Param.h>
+#include <AP_Param/AP_Param.h>
 
 class AP_Limit_Altitude : public AP_Limit_Module {
 

libraries/AP_Limits/AP_Limit_GPSLock.cpp

@@ -8,7 +8,7 @@
 /// @author Andrew Tridgell
 ///         Andreas Antonopoulos
 
-#include <AP_Limit_GPSLock.h>
+#include "AP_Limit_GPSLock.h"
 
 const AP_Param::GroupInfo AP_Limit_GPSLock::var_info[] PROGMEM = {
     // @Param: GPSLCK_ON

libraries/AP_Limits/AP_Limit_Geofence.cpp

@@ -8,7 +8,7 @@
 ///         Andreas Antonopoulos
 
 #include "AP_Limit_Geofence.h"
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 
 extern const AP_HAL::HAL& hal;
 

libraries/AP_Limits/AP_Limit_Geofence.h

@@ -11,10 +11,10 @@
 
 #include "AP_Limits.h"
 #include "AP_Limit_Module.h"
-#include <AP_Math.h>
-#include <AP_Param.h>
+#include <AP_Math/AP_Math.h>
+#include <AP_Param/AP_Param.h>
 #include <GPS.h>
-#include <../StorageManager/StorageManager.h>
+#include <StorageManager/StorageManager.h>
 
 #define MAX_FENCEPOINTS 6
 

libraries/AP_Limits/AP_Limit_Module.cpp

@@ -8,7 +8,7 @@
 ///         Andreas Antonopoulos
 
 
-#include <AP_Limit_Module.h>
+#include "AP_Limit_Module.h"
 
 extern const prog_char_t *get_module_name(enum moduleid i) {
 

libraries/AP_Limits/AP_Limit_Module.h

@@ -10,8 +10,8 @@
 #ifndef __AP_LIMIT_MODULE_H__
 #define __AP_LIMIT_MODULE_H__
 
-#include <AP_Common.h>
-#include <AP_Param.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_Param/AP_Param.h>
 
 // The module IDs are defined as powers of 2, to make a bit-field
 enum moduleid {

libraries/AP_Limits/AP_Limits.cpp

@@ -6,8 +6,8 @@
 /// @author Andrew Tridgell
 ///         Andreas Antonopoulos
 
-#include <AP_Limits.h>
-#include <AP_Limit_Module.h>
+#include "AP_Limits.h"
+#include "AP_Limit_Module.h"
 
 const AP_Param::GroupInfo AP_Limits::var_info[] PROGMEM = {
 

libraries/AP_Limits/AP_Limits.h

@@ -15,7 +15,7 @@
 #endif
 
 #include <stdint.h>
-#include <AP_Param.h>
+#include <AP_Param/AP_Param.h>
 #include "AP_Limit_Module.h"
 #include "AP_Limit_Altitude.h"
 #include "AP_Limit_Geofence.h"