Added ability to return the AR Controller Instance

the AR Controller Instance allows prototype commands to be called from outside of the aframe-ar.js class

aframe/build/aframe-ar.js

@@ -103,6 +103,15 @@ var Qb=[Ik,Zh,_h,Qj,Qi,Pi,Ri,Ag,sg,qg,rg,yg,kh,jh,Oi,Mj];var Rb=[Jk,ki,ji,gi];va
 		}
 	};
 	
+
+	/**
+		Returns the AR Controller Instance - allowing prototype commands to be called from outside of the aframe-ar.js class
+	*/
+
+	getARController = function(){
+	return myController;
+	}
+
 	/**
 		Detects markers in the given image. The process method dispatches marker detection events during its run.