Updated the "Requirements Specifications" (.docx)

All the yellow outlines are things i think we should discuss.

I don't know why I wrote this in English. wöus worschinlech of
lozärnerdütsch niemer verschtood :( :D
Merge pull request #12 from LukasGalliker/master

Updated the "Requirements Specifications" (.docx)
Added Navigation Prototype And Wireframe Documents