Add @:nativeGen to Settings.hx.

Disable `addMetadata` macro in build.hxml
Update readme with current state of project.

README.md

@@ -16,13 +16,6 @@ End of Stream encountered before parsing was completed.
    at PluginCore.Utilities.ObjectSerializer.Deserialize(String file, Object obj, Boolean checkValidity)
 ```
 
-And once FD opens, then...
-
-```
-Object reference not set to an instance of an object.
-
-   at sampleplugin.PluginMain.HandleEvent(Object sender, NotifyEvent e, HandlingPriority priority)
-   at PluginCore.Managers.EventManager.DispatchEvent(Object sender, NotifyEvent e)
-```
+And once FD opens, with a dialog box `Unable to load an imcompatiable or broken plugin. c:/path/to/plugin.dll`.
 
 [Sample Plugin]: https://github.com/fdorg/flashdevelop/tree/development/External/Plugins/SamplePlugin "FlashDevelop SamplePlugin"

build.hxml

@@ -14,9 +14,9 @@
 -net-lib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Drawing.dll@std"
 -net-lib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Windows.Forms.dll@std"
 
-# Required to prevent FD error.
---macro addMetadata('@:strict(cs.system.SerializableAttribute)', 'cs.internal.HxObject')
-#--macro addGlobalMetadata('', '@:strict(cs.system.SerializableAttribute)', true)
+# Doesnt appear to be needed any more. @:nativeGen seems to work to avoid serialization issue(s).
+#--macro addMetadata('@:strict(cs.system.SerializableAttribute)', 'cs.internal.HxObject')
+#--macro addGlobalMetadata('cs.', '@:strict(cs.system.SerializableAttribute)', true)
 
 -main Main
 

src/sampleplugin/Settings.hx

@@ -11,7 +11,7 @@ import cs.system.componentmodel.DefaultValueAttribute;
  */
 // @see https://github.com/HaxeFoundation/haxe/pull/3954
 @:strict(SerializableAttribute)
-class Settings {
+@:nativeGen class Settings {
 
 	@:isVar
 	@:property