README for CLI only version

This README mentions READMEs for every
exercise topic, those haven't been added yet.

README.md

@@ -1,3 +1,24 @@
 # rustlings
 
-A cool thing that is currently in development.
+Greetings and welcome to rustlings. This project contains small exercises get you used to reading and writing code. This includes reading and responding to compiler messages!
+
+## How to get started
+To use rustlings you have to have [rust](https://www.rust-lang.org/) installed on your machine.
+If you already have it, you can clone the repo to your local environment with:
+``` bash
+git clone https://github.com/rustlings/rustlings.git
+```
+To run rustlings you can either use `cargo run <subcommand>` or you can install rustlings on your machine
+by running `cargo install --path <path to the rustlings repo>` 
+(NOTE: for rustling to function you have to be in the directory of the repo).
+
+## Doing exercises
+The execises are sorted by topic and can be found in the subdirectory `rustlings/exercises/<topic>`. For every topic there is an additional README file with some reasources to get you started on the topic. We really recommend, that you have a look at them before you start. 
+
+Your task is simple every exercise contains an error you have to solve, in order to make it compile. 
+
+Running rustlings with the subcommand `verify` will compile every exercise in the recommended order. It will stop at the first exercise that didn't compile and show you the error to be solved.
+
+If you want to run a single erxercise you can use the subcommand `run <path to the exercise>`.
+
+When you struggle to solve the error, there is usually a tip at the bottom of the each exercise.