Add: Lessons abbreviation & Fix:Location Switching, Added Maschbau.

Grundlagen Rechnernetze und Verteilte Systeme →GRNVS

There was an error with the location matching. It has matched whole Flügels instead of just the buildings.
Fixed Copy&Paste Error
Merge pull request #1 from mammuth/master

Add: Lessons abbreviation & Fix:Location Switching, Added Maschbau.