Using a seed to get reproducible results.
Refactoring. Also replaced Windows linendings
More streamlined usage
Finished discrete Q model plotting.

Also added a test.
Upon iteration creation, the parameters for the discrete Q model are calculated
Adding the min and max period to the new iteration creation args.
Adjusting tests to the new interface
Adjusting docs
New command can now plot the Q model from the CLI.
Added test for the project Q model plotting function
Added Q_model plotting test for the CLI
Bugfix
Added CLI function to calculate a constant Q model.
Adding test for the Q model calculation in the CLI.
Adding pytest.ini to force doctests
Disabling availability doctests
Adding attenuation to the tutorial.
Small fix for the Q model plotting