Updated instructions.

README.md

-# Usage
+# Quick start
 
-TODO
+1) Copy or clone the source locally: ```git clone https://gitlab.rrz.uni-hamburg.de/forschungslabor_digitale_methoden/immo.git```
+2) Change to directory.
+3) Install requirements via running ```pip install -r requirements.txt``` (either globally or in a py-env) from the source folder.
+4) Run ```python main.py```.
+5) Import the file ```data.csv``` into stata (see ```readin.do``` as reference).