update Readme

Author: alex-lotz

ReleaseNotes.md

@@ -2,6 +2,10 @@
 
 This file contains the release notes for the SmartMDSD Toolchain version 3.x. For each release, it provides important information to users to support them in switching from one specific version the previous version. This includes information and instructions how to migrate content from one version to another.
 
+## v3.10
+
+This is a minor release, mostly focusing on bugfixing and smaller usability improvements. The biggest change concerns the Plain OPC UA usage which now requires the new **[Open62541CppWrapper library](https://github.com/Servicerobotics-Ulm/Open62541CppWrapper)** to be installed. Moreover, the Welcome page has been extended with new tutorials, links and cheat-sheets (use the menu Help->Welcome, or Help->Cheat sheets...). Finally, a new context menu has been added: when right-clicking on any folder within the SmartMDSD Project Explorer, you now can open this folder directly within a Linux terminal. Other than tha, all the previous major features from the last release v3.9 remain unchanged. Please note, that the old UI (mentioned in v3.9 below) is curretly still active, however, it will be likely removed in one of the next releases, so we encourage using the new UI from now on and to update your projects as described below in the v3.9 section.
+
 ## v3.9
 
 This release provides a **major User Interface (UI) update**. While the old UI still can be used as before, it is considered deprecated as of this release, and it will be removed in one of the following releases as soon as the new UI has been proved to be stable and robust enough in the field. While the new UI has cleaned-up and harmonized all the context menus and commands, the basic functionality is still there and for the existing projects no major changes are required (besides of adding a new project nature as described below). You can also continue to use your existing workspaces. In order to use the full power of the new UI, you just have to configure one of the **new SmartMDSD project natures** for each of your existing projects. In this release, four dedicated project natures exist: DomainModels -, Component -, Behavior -, and System Project Nature. You can configure one of these natures as follows: