Revert "Remove test driver"

This reverts commit 372a6923b7d4771f9dfd61cd4e18b65a426144f6.
Add Unittest driver again
Test Settings::matrix_to_state
Normalize correlation matrices in the sample
Nicen up plotall.py a bit
Quit after creating the pool if --samples 0
Store some JSON
Use JSON for report
Fix Regex
Remove stopping
Let hash depend on JSON only
Deactivate report for now
Store JSON a little later
Fix prefactor
Add another sweep script
Refactor analysis script a bit
Reorder, docstrings
Better help
More docstring
Collect fitting data