update readme with some docs

README.md

 # ProteoxDriver
 
 A QCoDeS driver for the Proteox Fridge by Oxford Instruments
+
+## Installation
+
+```cmd
+pip install proteox_driver --index-url https://gitlab.tudelft.nl/api/v4/projects/7052/packages/pypi/simple
+```
+
+## Usage
+
+```py
+from proteox_driver.proteox import oiDECS
+driver = oiDECS(name="test", host="localhost", port=33577)
+driver.PT1_Head_Temperature()
+```