Copying //UE4/Dev-Build to //UE4/Dev-Main (Source: //UE4/Dev-Build @ 2982165)

==========================
MAJOR FEATURES + CHANGES
==========================

Change 2963214 on 2016/05/02 by Ben.Marsh

	BuildGraph: Allow specifying optional dependencies for a node, indicating that the build products from an upstream node are desired, but should not block the node from running.

Change 2972295 on 2016/05/10 by Ben.Marsh

	EC: Remove spacing in notification emails to reduce size, and help prevent gmail from truncating messages. Also allow mailing notification emails when doing a dry run, and reading stream settings from another branch.

Change 2976096 on 2016/05/12 by Ben.Marsh

	EC: Store properties for the last succeeded builds, including the list of users that were notified about it.

Change 2976390 on 2016/05/12 by Ben.Marsh

	EC: Add a separate line to the notification email summary with a link to edit settings, and pass the missing ec-update parameter to set the last build status.

Change 2976441 on 2016/05/12 by Ben.Marsh

	UAT: Remove log file copy on builders after UAT failure. This is done outside the EC step that originally did it now.

Change 2976456 on 2016/05/12 by Ben.Marsh

	BuildGraph: Catch exceptions thrown by child processes failing when building or running UAT commands, and return failure normally without dumping callstacks.

Change 2978440 on 2016/05/16 by Ben.Marsh

	EC: Age out entries from the "latest builds" list after a week. There's no obvious way to tell if a node has been removed, but a periodic cleanup should keep the build notifications list in check.

Change 2979446 on 2016/05/16 by Ben.Marsh

	Rename ambiguous headers which exist with the same name in different paths.

Change 2979839 on 2016/05/16 by Ben.Marsh

	UE4: Renaming HTML5 SocketSubsystem files to eliminate ambiguities.

Change 2979852 on 2016/05/16 by Ben.Marsh

	UE4: Use explicit relative paths for public headers in PortalServiceInterfaces modules which do not have unique names

Change 2980113 on 2016/05/17 by Ben.Marsh

	UE4: Fix include paths for HTML5 SocketSubsystem files.

Change 2980117 on 2016/05/17 by Ben.Marsh

	UE4: Remove reference to private PCH from Oculus common code.

Change 2980186 on 2016/05/17 by Ben.Marsh

	UAT: Add a -StopOnErrors parameter to UE4Build, which is propagated to XGE.

Change 2980879 on 2016/05/17 by Ben.Marsh

	UE4: Fixup Lightmass to use LightmassPCH.h rather than stdafx.h

Change 2981117 on 2016/05/17 by Ben.Marsh

	Portal: Use a unique name for the Portal PCH, rather than just calling it PrivatePCH.h

Change 2981839 on 2016/05/18 by Ben.Marsh

	Replace ambiguous D3D11/D3D12 includes with direct includes for the current platform.

#lockdown Nick.Penwarden

[CL 2982178 by Ben Marsh in Main branch]

Engine/Source/Programs/UnrealLightmass/Private/Lighting/LightmapData.cpp

@@ -1,6 +1,6 @@
 // Copyright 1998-2016 Epic Games, Inc. All Rights Reserved.
 
-#include "stdafx.h"
+#include "LightmassPCH.h"
 #include "Exporter.h"
 #include "LightmassSwarm.h"