Release v0.1.8

Tests for create files and folders + setup

The tests required some refactoring in order for them to work. This has made a breaking change when calling from the command line which I will look into another time:

python dsutils/setup.py
Traceback (most recent call last):
File "dsutils\setup.py", line 1, in
from .internals import *
ImportError: attempted relative import with no known parent package