Donttrust

Fixes an issue with not being able to use floats in DontTrust.

Issue: 4
Merged PR: 5

Fixed a bug where the `DontTrust` object would keep its previous state, i.e. it would keep the previous fields when we create a new DontTrust object.

Rename `**kwargs` to `**items` in the `validate*` functions of `__init__.py`. This is to keep consistency

kwargs -> items

setup.py` no longer uses the `pathlib` python module. It uses `os.path` instead.