Explain basic usage

README.md

@@ -1,4 +1,12 @@
-## Usage
+## Introduction
+
+This layer contains recipes/classes/etc. for building Slint's C++ API, as well as the Rust based
+demos.
+
+For a Rust based application using Slint, use [meta-rust](https://github.com/meta-rust/meta-rust) directly,
+For a C++ based application, use this layer, and in your application's recipe inherit from `cmake` and `slint`.
+
+## Prerequisites
 
 Meta-slint requires:  
 
@@ -13,6 +21,8 @@ Check the [layer.conf](conf/layer.conf) LAYERSERIES_COMPAT_meta for yocto versio
 For local version locking just copy the slint-cpp_x.x.x.bb and modify the SLINT_REV 
 and set PREFERRED_VERSION_slint-cpp = "x.x.x"
 
+In your application's recipe
+
 ## Features
 
 For git builds and builds from Slint version 1.3 onwards, certain features are