message: Reference developer-setup guide from the README, other tweaks.
diff: @@ -14,7 +14,6 @@ This is a summary of a setup and workflows for developers who want to work with
  - Install Microsoft Visual Studio 2019 from https://visualstudio.microsoft.com/en/downloads/
  - Install the Unreal Engine (version 4.26 or newer) from https://www.unrealengine.com/en-US/download
  -
  ## Initial setup
  ### Setting up the directories
  @@ -32,7 +31,7 @@ This can be set up with the following sequence of commands, on the console, star
  git clone https://github.com/CesiumGS/cesium-unreal-samples.git
  cd cesium-unreal-samples
  - md Plugins
  + mkdir Plugins
  cd Plugins
  git clone --recursive https://github.com/CesiumGS/cesium-unreal.git
  