减少程序启动时，加载AB的数量、体积。

减少前： 登录（游戏公告）610MB/205个AB；打怪：816MB/393个AB
减少后： 登录（游戏公告）100MB/136个AB；打怪：457MB/346个AB
具体改动：
- 不打包mat.unity3d，避免依赖爆炸。
- 提前打UI与effect AB，减少他们对别的AB的依赖。

Assets/Editor/AssetBundle/AssetBundleMap.cs

@@ -353,6 +353,14 @@ public class AssetBundleMap : EditorWindow
         addBuildAssetsCommon(maps, "config.unity3d", Constants.CsvConfig, "*.csv");
         addBuildAssetsCommon(maps, "xml.unity3d", Constants.XmlConfig, "*.xml");
 
+        if (showProcessBar)
+            EditorUtility.DisplayProgressBar("Generate Bundle Build Map", "UI...", 0.35f);
+        addBuildAssetsUI(maps);
+
+        if (showProcessBar)
+            EditorUtility.DisplayProgressBar("Generate Bundle Build Map", "Effect...", 0.37f);
+        addBuildAssetsEffect(maps);
+
         // audio
         if (showProcessBar)
             EditorUtility.DisplayProgressBar("Generate Bundle Build Map", "Audio...", 0.4f);
@@ -378,15 +386,6 @@ public class AssetBundleMap : EditorWindow
             EditorUtility.DisplayProgressBar("Generate Bundle Build Map", "Actor...", 0.7f);
         addBuildAssetsActor(maps);
 
-        if (showProcessBar)
-            EditorUtility.DisplayProgressBar("Generate Bundle Build Map", "Effect...", 0.75f);
-
-        addBuildAssetsEffect(maps);
-
-        if (showProcessBar)
-            EditorUtility.DisplayProgressBar("Generate Bundle Build Map", "UI...", 0.8f);
-        addBuildAssetsUI(maps);
-
         if (showProcessBar)
             EditorUtility.DisplayProgressBar("Generate Bundle Build Map", "Scene...", 0.85f);
         addBuildAssetsScene(maps);
@@ -596,10 +595,12 @@ public class AssetBundleMap : EditorWindow
                     {
                         addData(maps, ShaderAbName, dependencyAssetName);
                     }
+                    #if false
                     else if (fileType == "mat")
                     {
                         addData(maps, MatAbName, dependencyAssetName);
                     }
+                    #endif
                     else if (fileType != "cs")
                     {
                         addData(maps, abName, dependencyAssetName);
@@ -639,10 +640,12 @@ public class AssetBundleMap : EditorWindow
                     {
                         addData(maps, ShaderAbName, dependencyAssetName);
                     }
+                    #if false
                     else if (fileType == "mat")
                     {
                         addData(maps, MatAbName, dependencyAssetName);
                     }
+                    #endif
                     else if (fileType != "cs")
                     {
                         addData(maps, abName, dependencyAssetName);
@@ -681,10 +684,12 @@ public class AssetBundleMap : EditorWindow
                     {
                         addData(maps, ShaderAbName, dependencyAssetName);
                     }
+                    #if false
                     else if (fileType == "mat")
                     {
                         addData(maps, MatAbName, dependencyAssetName);
                     }
+                    #endif
                     else if (fileType == "jpg" || fileType == "png" || fileType == "tga" || fileType == "tif" ||
                              fileType == "psd")
                     {
@@ -725,10 +730,12 @@ public class AssetBundleMap : EditorWindow
                 {
                     addData(maps, ShaderAbName, dependencyAssetName);
                 }
+                #if false
                 else if (fileType == "mat")
                 {
                     addData(maps, MatAbName, dependencyAssetName);
                 }
+                #endif
                 else if (fileType != "cs")
                 {
                     addData(maps, abName, dependencyAssetName);
@@ -767,10 +774,12 @@ public class AssetBundleMap : EditorWindow
                     {
                         addData(maps, ShaderAbName, dependencyAssetName);
                     }
+                    #if false
                     else if (fileType == "mat")
                     {
                         addData(maps, MatAbName, dependencyAssetName);
                     }
+                    #endif
                     else if (fileType == "jpg" || fileType == "png" || fileType == "tga" || fileType == "tif" ||
                              fileType == "psd")
                     {
@@ -825,10 +834,12 @@ public class AssetBundleMap : EditorWindow
                     {
                         addData(maps, ShaderAbName, dependencyAssetName);
                     }
+                    #if false
                     else if (fileType == "mat")
                     {
                         addData(maps, MatAbName, dependencyAssetName);
                     }
+                    #endif
                     else if (fileType == "jpg" || fileType == "png" || fileType == "tga" || fileType == "tif" ||
                              fileType == "psd")
                     {
@@ -888,10 +899,12 @@ public class AssetBundleMap : EditorWindow
                     {
                         addData(maps, ShaderAbName, dependencyAssetName);
                     }
+                    #if false
                     else if (fileType == "mat")
                     {
                         addData(maps, MatAbName, dependencyAssetName);
                     }
+                    #endif
                     else if (fileType == "jpg" || fileType == "png" || fileType == "tga" || fileType == "tif" ||
                              fileType == "psd")
                     {
@@ -985,10 +998,14 @@ public class AssetBundleMap : EditorWindow
                     {
                         addData(maps, ShaderAbName, dependencyAssetName);
                     }
+                    // Unity:
+                    //      Do not collect all materials into one AssetBundle, otherwise the dependencies will explode and the streaming experience will be terrible.
+                    #if false
                     else if (fileType == "mat")
                     {
                         addData(maps, MatAbName, dependencyAssetName);
                     }
+                    #endif
                     else if (fileType == "prefab")
                     {
                         if (dependencyAssetName.Contains("Scenes/Scene_common"))