Adding instructions to documentation

Author: TrisNol

README.MD

@@ -7,3 +7,8 @@ This repo contains a skeleton for Python packages containing some basic DevOps´
 You can download the module by executing the following command (replace `<tag>` with the version you would like to download):
 `pip install git+https://github.com/TrisNol/python-sample-package<tag>`
 
+The module can then be used as follows:
+```python
+from example_package.example import add_one
+add_one(41) # returns 42
+```