Lsf Plan App Test Build 1

Features:
-Downloading of a lecture plan from HTWG LSF
-Showing a brief overview of lecture for a specific day
-In-time notifications before a lecture starts, e.g. 15 before every lecutre with a brief info of the topic, the room and the time

Missing:
-German translation (dunno why I did it in english first ^^)
-A download progress animation blocking the ui