fixed some of greendale levels

fixes some of #1488
Hippie Hallway: fixed chairs at end of hallways so you can stand on them

Greendale exterior: Locked all inaccessible doors
Fixed platforms on benches
Fixed platform on Guzman's statue's head 
Added in outline to library building
Added platforms to trashcans

Rave Hallways:Locked all inaccessible doors

Admin Hallway: Locked inaccessible doors
Reviewed and fixed prompt messages for capitalisation & punctuation issues

Dean's office reception: Locked door behind desk
You should now be able to stand on the filing cabinets along the back wall