Adds icon and startup image for iOS
Moves image files to app/img
Adds preview of next week when accessed on weekend

This fixes #8
Adds data templates

Fixes #9
Adds fairly fault-tolerant grabber

Fixes #10
Adds mensa data of week 14 in 2014
Fixes landscape startup image and adds more images.

Additionally decreases file size of all existing images and adds explicit Android support.