[Feature] Custom goals and different EER equations

[LesikEdelweiss]

I feel like the IOM equations are overestimating for obese people (for me it gives me around 700 calories/day more than others). It would be great, if we had a possibility to choose between different equations, or to set custom goals. I could provide a pull request for that feature, if you like this idea.

[DarkWingMcQuack]

would be awesome if you could select your own macro distribution + calories.
I know how much calories i want to eat but it seems i cannot set everything to custom macros + calories

[Hooloovoo]

See also #27