Per Week/Month Overview

[JonnesTT]

I've been wondering how many calories I've "saved" since starting to use the app. So I feel like it'd be cool to have a summary of the last week or month with total and per-day-average calorie surplus/deficit (and maybe for macros too).
If we're talking longer spans, a graph might also make sense to see trends easier.

Also, huge thanks for making the app :D