Add hasCamera() method to flash camera detection

lms/static/js/verify_student/CameraCapture.as

@@ -58,6 +58,7 @@ package
 			ExternalInterface.addCallback("reset", reset);
 			ExternalInterface.addCallback("imageDataUrl", imageDataUrl);
 			ExternalInterface.addCallback("cameraAuthorized", cameraAuthorized);
+			ExternalInterface.addCallback("hasCamera", hasCamera);
 			
 			// Notify the container that the SWF is ready to be called. 
 			ExternalInterface.call("setSWFIsReady"); 
@@ -108,6 +109,10 @@ package
 			return permissionGiven;
 		}
 		
+		public function hasCamera():Boolean {
+			return (Camera.names.length != 0);
+		}
+		
 		public function statusHandler(event:StatusEvent):void {
 			switch (event.code) 
 			{ 

lms/static/js/verify_student/photocapture.js

@@ -189,9 +189,11 @@ function initSnapshotHandler(names, hasHtml5CameraSupport) {
 }
 
 function objectTagForFlashCamera(name) {
+  // I manually update this to have ?v={2,3,4, etc} to avoid caching of flash
+  // objects on local dev.
   return '<object type="application/x-shockwave-flash" id="' +
          name + '" name="' + name + '" data=' +
-         '"/static/js/verify_student/CameraCapture.swf?v=2"' +
+         '"/static/js/verify_student/CameraCapture.swf?v=3"' +
           'width="500" height="375"><param name="quality" ' +
           'value="high"><param name="allowscriptaccess" ' +
           'value="sameDomain"></object>';