[unity] Some cleanup and docs.

spine-unity/Assets/spine-unity/Asset Types/Editor/SkeletonDataAssetInspector.cs

@@ -574,8 +574,8 @@ namespace Spine.Unity.Editor {
 					#else
 					if (spriteCollection.objectReferenceValue == null)
 						warnings.Add("SkeletonDataAsset requires tk2DSpriteCollectionData.");
-					else
-						warnings.Add("Your sprite collection may have missing images.");
+//					else
+//						warnings.Add("Your sprite collection may have missing images.");
 					#endif
 				}
 			}

spine-unity/Assets/spine-unity/Modules/AttachmentTools/AttachmentTools.cs

@@ -341,6 +341,8 @@ namespace Spine.Unity.Modules.AttachmentTools {
 			return Sprite.Create(ar.GetMainTexture(), ar.GetUnityRect(), new Vector2(0.5f, 0.5f), pixelsPerUnit);
 		}
 
+		/// <summary>Creates a new Texture2D object based on an AtlasRegion.
+		/// If applyImmediately is true, Texture2D.Apply is called immediately after the Texture2D is filled with data.</summary>
 		public static Texture2D ToTexture (this AtlasRegion ar, bool applyImmediately = true) {
 			Texture2D sourceTexture = ar.GetMainTexture();
 			Rect r = ar.GetUnityRect(sourceTexture.height);