added the quick and dirty way of installing in readme

README.md

@@ -33,7 +33,19 @@ $
 TODO: Add URL once the package was published the first time
 -->
 
+---
 
+The fast way of using SWET is to install it as a `pip` package inside a virtual environment.
+
+This is the code you have to run inside the root direcory of this repository in order to use SWET as `swet` inside your terminal.
+
+```
+python -m venv venv
+. ./venv/bin activate
+pip install -e .
+```
+
+>Please Note that the package only exists as long as the `venv` does.
 
 Writing of SWET-Tests
 =====================
@@ -121,5 +133,3 @@ Installation & Setup
 $ pip install tox pre-commit
 $ pre-commit install
 ~~~
-
-