document the various overlay and animation change traits

OpenRA.Mods.D2k/Render/WithBuildingPlacedOverlayInfo.cs

@@ -14,6 +14,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA.Render
 {
+	[Desc("Rendered when the actor constructed a building.")]
 	public class WithBuildingPlacedOverlayInfo : ITraitInfo, Requires<RenderSpritesInfo>, Requires<IBodyOrientationInfo>
 	{
 		[Desc("Sequence name to use")]

OpenRA.Mods.D2k/Render/WithCrumbleOverlay.cs

@@ -13,6 +13,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA.Render
 {
+	[Desc("Rendered together with the \"make\" animation.")]
 	public class WithCrumbleOverlayInfo : ITraitInfo, Requires<RenderSpritesInfo>
 	{
 		[Desc("Sequence name to use")]

OpenRA.Mods.D2k/Render/WithDeliveryOverlay.cs

@@ -15,6 +15,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA.Render
 {
+	[Desc("Rendered when ProductionAirdrop is in progress.")]
 	public class WithDeliveryOverlayInfo : ITraitInfo, Requires<RenderSpritesInfo>, Requires<IBodyOrientationInfo>
 	{
 		[Desc("Sequence name to use")]

OpenRA.Mods.D2k/Render/WithDockingOverlay.cs

@@ -15,6 +15,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA.Render
 {
+	[Desc("Rendered when a harvester is docked.")]
 	public class WithDockingOverlayInfo : ITraitInfo, Requires<RenderSpritesInfo>, Requires<IBodyOrientationInfo>
 	{
 		[Desc("Sequence name to use")]

OpenRA.Mods.D2k/Render/WithProductionOverlay.cs

@@ -16,6 +16,8 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA.Render
 {
+	[Desc("Renders an animation when the Production trait of the actor is activated.",
+		"Works both with per player ClassicProductionQueue and per building ProductionQueue, but needs any of these.")]
 	public class WithProductionOverlayInfo : ITraitInfo, Requires<RenderSpritesInfo>, Requires<IBodyOrientationInfo>
 	{
 		[Desc("Sequence name to use")]