[unity] Unity SpriteAtlas support: Upon build to platform, the internally generated sprite atlas texture is used instead of the png file generated for the editor (to reduce additional memory usage). This completes Unity SpriteAtlas support, together with previous commit d35550d. Closes #940.

spine-unity/Assets/Spine/Runtime/spine-unity/Asset Types/SpineSpriteAtlasAsset.cs

@@ -190,6 +190,9 @@ namespace Spine.Unity {
 				texture = AccessPackedTexture(sprites);
 
 			Material material = materials[0];
+		#if !UNITY_EDITOR
+			material.mainTexture = texture;
+		#endif
 
 			Spine.AtlasPage page = new AtlasPage();
 			page.name = spriteAtlas.name;