Add comment explaning the change

Author: Rajinder Ramgarhia

AsyncDisplayKit.xcodeproj/project.pbxproj

@@ -1547,7 +1547,6 @@
 				058D09B9195D04C000B7D73C /* Frameworks */,
 				058D09BA195D04C000B7D73C /* Resources */,
 				3B9D88CDF51B429C8409E4B6 /* Copy Pods Resources */,
-				2AC85249A2221047409FABBB /* Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -1647,21 +1646,6 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		2AC85249A2221047409FABBB /* Embed Pods Frameworks */ = {
-			isa = PBXShellScriptBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			inputPaths = (
-			);
-			name = "Embed Pods Frameworks";
-			outputPaths = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-AsyncDisplayKitTests/Pods-AsyncDisplayKitTests-frameworks.sh\"\n";
-			showEnvVarsInLog = 0;
-		};
 		2E61B6A0DB0F436A9DDBE86F /* Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;

AsyncDisplayKit/ASControlNode.m

@@ -339,6 +339,7 @@ - (void)sendActionsForControlEvents:(ASControlNodeEvent)controlEvents withEvent:
   _ASEnumerateControlEventsIncludedInMaskWithBlock(controlEvents, ^
     (ASControlNodeEvent controlEvent)
     {
+      // Use a copy to itereate, the action perform could call remove causing a mutation crash.
       NSMapTable *eventDispatchTable = [[_controlEventDispatchTable objectForKey:_ASControlNodeEventKeyForControlEvent(controlEvent)] copy];
 
       // For each target interested in this event...