Changes regarding YCN submission

I have decided to change a few aspects of the PDF to better show off the app and to give a better insight to the design of my app as well as a better understanding and the research process as well as changing a few images for better ones.

1: Added background tints to all pages
2: Added email
3: Changed out first coffee image
4: Added fonts
5: Added further app description
6: Added more images of app
7: Added brain storms
8: Added app use