AP_Scripting: add set_origin and initialised bindings

added bindings and example scripts

libraries/AP_Scripting/examples/ahrs-set-origin.lua

@@ -0,0 +1,23 @@
+-- example script for using "set_origin()"" and "initialised()"
+-- sets the ekf origin if not already set
+
+
+function update ()
+
+    if not ahrs:initialised() then
+        return update, 5000
+    end
+    
+    origin = assert(not ahrs:get_origin(),"Refused to set EKF origin - already set")
+    location = Location() location:lat(-353632640) location:lng(1491652352) location:alt(58409)
+    
+    if ahrs:set_origin(location) then
+        gcs:send_text(0, string.format("Origin Set - Lat:%.7f Long:%.7f Alt:%.1f", location:lat()/10000000, location:lng()/10000000, location:alt()/100))
+    else
+        gcs:send_text(0, "Refused to set EKF origin")
+    end
+
+    return
+end
+
+return update()

libraries/AP_Scripting/generator/description/bindings.desc

@@ -46,6 +46,8 @@ singleton AP_AHRS method set_posvelyaw_source_set void uint8_t 0 2
 singleton AP_AHRS method get_vel_innovations_and_variances_for_source boolean uint8_t 3 6 Vector3f'Null Vector3f'Null
 singleton AP_AHRS method set_home boolean Location
 singleton AP_AHRS method get_origin boolean Location'Null
+singleton AP_AHRS method set_origin boolean Location
+singleton AP_AHRS method initialised boolean
 
 include AP_Arming/AP_Arming.h