[modelio] Update for Xcode 10 beta 2 (#4378)

Renamed and obsoleted 'FromBundle' in favor of 'CreateTexture' for consistency with new API and because I believe it was a mistake anyway.
For instance 'textureNamed:' was 'FromBundle', there's no mention of the bundle there.

src/modelio.cs

@@ -1638,13 +1638,33 @@ namespace ModelIO {
 		[Export ("init")]
 		IntPtr Constructor ();
 
+#if !XAMCORE_4_0
+		[Static]
+		[Obsolete ("Use 'CreateTexture' instead.")]
+		[Wrap ("CreateTexture (name)")]
+		MDLTexture FromBundle (string name);
+#endif
+
 		[Static]
 		[Export ("textureNamed:")]
-		MDLTexture FromBundle (string name);
+		MDLTexture CreateTexture (string name);
+
+#if !XAMCORE_4_0
+		[Static]
+		[Obsolete ("Use 'CreateTexture' instead.")]
+		[Wrap ("CreateTexture (name, bundleOrNil)")]
+		MDLTexture FromBundle (string name, [NullAllowed] NSBundle bundleOrNil);
+#endif
 
 		[Static]
 		[Export ("textureNamed:bundle:")]
-		MDLTexture FromBundle (string name, [NullAllowed] NSBundle bundleOrNil);
+		MDLTexture CreateTexture (string name, [NullAllowed] NSBundle bundleOrNil);
+
+		[TV (12,0), Mac (10,14, onlyOn64: true), iOS (12,0)]
+		[Static]
+		[Export ("textureNamed:assetResolver:")]
+		[return: NullAllowed]
+		MDLTexture CreateTexture (string name, IMDLAssetResolver resolver);
 
 		[Static]
 		[Export ("textureCubeWithImagesNamed:")]
@@ -1771,6 +1791,7 @@ namespace ModelIO {
 
 	[iOS (9,0), Mac(10,11, onlyOn64 : true)]
 	[BaseType (typeof(NSObject))]
+	[DesignatedDefaultCtor]
 	interface MDLTransform : MDLTransformComponent, NSCopying {
 
 		[Export ("initWithTransformComponent:")]

tests/xtro-sharpie/iOS-ModelIO.todo

@@ -1,2 +0,0 @@
-!missing-designated-initializer! MDLTransform::init is missing an [DesignatedInitializer] attribute
-!missing-selector! +MDLTexture::textureNamed:assetResolver: not bound

tests/xtro-sharpie/macOS-ModelIO.todo

@@ -1,2 +0,0 @@
-!missing-designated-initializer! MDLTransform::init is missing an [DesignatedInitializer] attribute
-!missing-selector! +MDLTexture::textureNamed:assetResolver: not bound

tests/xtro-sharpie/tvOS-ModelIO.todo

@@ -1,2 +0,0 @@
-!missing-designated-initializer! MDLTransform::init is missing an [DesignatedInitializer] attribute
-!missing-selector! +MDLTexture::textureNamed:assetResolver: not bound