Add README and fix package manifest

Publisher name in the manifest needs to match the
actual name of the account that publishes the package.

GodotAddinVS/source.extension.vsixmanifest

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PackageManifest Version="2.0.0" xmlns="http://schemas.microsoft.com/developer/vsx-schema/2011" xmlns:d="http://schemas.microsoft.com/developer/vsx-schema-design/2011">
     <Metadata>
-        <Identity Id="Godot.Addin" Version="1.0" Language="en-US" Publisher="Godot Engine" />
+        <Identity Id="Godot.Addin" Version="1.0" Language="en-US" Publisher="Ignacio Roldán Etcheverry" />
         <DisplayName>Godot Addin</DisplayName>
         <Description xml:space="preserve">Support for Godot Engine C# projects, including debugging and extended code completion.</Description>
         <License>LICENSE.txt</License>
@@ -9,7 +9,7 @@
         <Tags>Godot</Tags>
     </Metadata>
     <Installation>
-        <InstallationTarget Version="[16.0,)" Id="Microsoft.VisualStudio.Community" />
+        <InstallationTarget Version="[16.0,17.0)" Id="Microsoft.VisualStudio.Community" />
     </Installation>
     <Assets>
         <Asset Type="Microsoft.VisualStudio.MefComponent" d:Source="Project" d:ProjectName="GodotCompletionProviders" Path="|GodotCompletionProviders|" />

README.md

@@ -0,0 +1,29 @@
+# Godot C# extension for Visual Studio
+Visual Studio extension for the Godot game engine C# projects.
+
+## Requirements
+
+**Godot 3.2.2** or greater. Older versions of Godot are not supported.
+
+## Features
+
+- Debugging.
+- Launch a game directly in the Godot editor from Visual Studio.
+- Additional code completion for Node paths, Input actions, Resource paths, Scene paths and Signal names.
+
+**NOTES:**
+
+- A running Godot instance must be editing the project in order for code completion and the `Play in Editor` debug target to work.
+- Node path suggestions are provided from the currently edited scene in the Godot editor.
+
+## Debug targets
+
+- **Play in Editor**\
+  Launches the game in the Godot editor for debugging in Visual Studio.\
+  For this option to work, a running Godot instance must be editing the project.
+- **Launch**\
+  Launches the game with a Godot executable for debugging in Visual Studio.\
+  Before using this option, the value of the _"executable"_ property must be changed
+  to a path that points to the Godot executable that will be launched.
+- **Attach**\
+  Attaches to a running Godot instance that was configured to listen for a debugger connection.