Added more details concerning requirements

README.md

@@ -59,19 +59,20 @@ To ease initial setup and management the `building_manager.py` is provided. This
 The script has a few requirements for the system and the python environment.
 
 **System:**
-```sh
+```
 docker
 docker-compose
 docker-machine
-python
-mosquitto (mosquitto_passwd utility)
+python3 (at least 3.6)
+python3-pip
+mosquitto (needed to for mosquitto_passwd utility)
 ssh-keygen
 ```
 
 On a Ubuntu System these can be installed following these commands:
 
 ```bash
-sudo apt install mosquitto 			# Needed to use mosquitto_passwd
+sudo apt install mosquitto, python3-pip		# Needed to use mosquitto_passwd
 sudo systemctl stop mosquitto				# Stop Mosquitto service
 sudo systemctl disable mosquitto			# Disable Mosquitto service
 ```

building_manager.py

@@ -848,7 +848,7 @@ def generate_checkbox_choices(list):
 if __name__ == '__main__':
     import argparse
     parser = argparse.ArgumentParser(
-        prog='building_manger',
+        prog='building_manager',
         description='Generate and manage multi'
         'building configurations of openHAB with docker swarm')
     parser.add_argument(