Nutrition: don’t force users to set up a plan

[rolandgeider]

Use case

Not all users want to set up a complete plan up front, many just want to track their calories.

Proposal

Allow the user to fill in a simple form for total energy or a combination of protein - carbs - fat (energy can be calculated from this). Alternatively of course, no goals can be set, just logging. The rest of the logic with the nutritional values, charts, etc should still work with few changes.