Round to the nearest minute when displaying durations instead of using Math.floor.
Assert that a timeline for extract-only recipes can be successfully generated.
Update timeline documentation to show a more human-friendly example.
Add degree symbol to temperatures in the generated recipe timeline
Handle secondary and tertiary fermentation steps when generating recipe timeline, add a test including secondary fermentation.
Version bump to 0.5.1 for a new release with a bunch of timeline fixes.