Tracking Food Items

[mikeczech]

As an end user I want to track my eating habits so that I can see if I live up to my healthy nutrition plan.

Given a picture was taken using the app
When the save-button was pressed
Then the app saves the picture, the label, and the amount of calories AND displays the app's main view

Given multiple pictures of food were taken using the app
When the app's main view is opened
Then the app shows a list of all consumed food items including a label and the amount of calories for each item

Note that this issue also demands local persistence of the tracked food items.

This issue depends on #1, #2, and #3