simplify the passing of time
further simplify the passage of time
dry Makefile
Merge branch 'golden_master' into solution
check code with flake8
Merge branch 'golden_master' into solution
add EditorConfig
conform to PEP8
Merge branch 'master' into golden_master
conform to PEP8
EditorConfig: do not add final newline
Merge branch 'master' into golden_master
Merge branch 'golden_master' into solution

Conflicts:
	src/currency_rates.py
	test/unit/currency_rates_with_patching_test.py