Updated README, bumped version to 0.2.2

Project.toml

 name = "PersefoneDesktop"
 uuid = "78b50b3d-c6fc-409a-aced-ad0772f04556"
 authors = ["Daniel Vedder <daniel.vedder@idiv.de>"]
-version = "0.2.1"
+version = "0.2.2"
 
 [deps]
 CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"

README.md

@@ -6,7 +6,28 @@ This is the graphical user interface to the [Persefone model](http://persefone-m
 With it, you can watch a simulation run unfold and interactively explore how the model 
 functions.
 
-## Install & run
+## Quick start
+
+*Follow these instructions if you simply want to try out the software as a user.
+If you want to play around with the source code, see the next section.*
+
+1. Download the [Julia programming language](https://julialang.org/downloads/) and install it on 
+  your computer.
+2. Start Julia. This should launch a commandline interface/REPL.
+3. Execute the following commands (copy-and-paste should work):
+
+```julia
+using Pkg
+Pkg.add(url="https://git.idiv.de/persefone/persefone-model.git")
+Pkg.add(url="https://git.idiv.de/persefone/persefone-desktop.git")
+using PersefoneDesktop
+ENV["QSG_RENDER_LOOP"] = "basic" # only needed on Windows
+launch()
+```
+
+## Running from the repo
+
+*Follow these instructions if you want to get to grips with the source code.*
 
 **To install:** Install [Julia](https://julialang.org/downloads/) and download/clone 
 this repository. Open a Julia REPL in the downloaded folder and execute the following