Update README.md (#525)

In the current manual there is no clear explanation on how to quickly get started to play around with CadQuery through the CQ-editor (binaries). 

Proposed change: 
Under "Getting started" start out with the thing most people running into this project for the first time will probably want to try first: just fiddle around with CQ-editor. In the CQ-editor "installation" section I'll propose a change to add binary installation instructions (which is much easier/quicker to get started with than "the Conda way").

README.md

@@ -35,6 +35,9 @@ The original version of CadQuery was built on the FreeCAD API. This was great be
 
 ## Getting started
 
+To quickly play around with CadQuery and see it's capabilities, see the [CQ-editor GUI](https://github.com/CadQuery/CQ-editor) manual.  
+If you want to use CadQuery for your own project, keep reading: 
+
 It is currently possible to use CadQuery for your own projects in 3 different ways:
 * Using the [CQ-editor GUI](https://github.com/CadQuery/CQ-editor)
 * From a [Jupyter notebook](https://github.com/bernhard-42/jupyter-cadquery)