Nutrimetrics

- Add multiple dietary reference intakes
- Add egg omelet with biotin adjustment
- Display DRI percentages in color
- Adjust molybdenum for cheddar, greek yogurt and egg omelet
- Print an error when a JSON file is badly formatted
- Add vegan, low-carb and high-protein sample meal plans

- Add nutrimetrics-init command
- Add food description
- Add meal plan's target
- Display target data in spreadsheet

Initial implementation of the NutriMetrics package.