Update __init__.py
Update __init__.py

Copied the description about errors-argument from Pyh-Doc (https://docs.python.org/3/howto/unicode.html).
Im not sure how to create the HTML-Doc out of this file. So, I could not test the doc-output.
foosel/OctoPrint,foosel/OctoPrint,foosel/OctoPrint,foosel/OctoPrint