preventing the user from moving the dead thru the wall

Tested Scenes:
chemistry room
cs1 room
cs2 room
EntranceHall
fishBoneScene
frontalLectureScene
groupWorkScene
horseshoeRoom
MediaRoom

- added Monobehavior to websocket prefab and registered static init and eventloop of rtc coach on that script

expected result: websocket scripts will only be used if the websocket prefab is within the scene

fix merges, update unity to beta,

FabiImport -> Flammable Objects
FranzImport -> Questionnaire in VR

tag "ClampBoard" added

Tested rooms and mockup movement (no automatic camera swap)
few FBX were cleaned and blend files sorted to blindfiles.
deprecated functions reworked
package updates

resonance Audio done -untested
TV and smartboard done -untested
lighting not done yet

fix some structureTreeHandlings

issue: fit other rooms into new scaling size

new laserPointer functions:
- picking students who raise their arm
- mark distortions as "seen"

updated posters
poster content loads from Resources folder during runtime

PlakatScript

- fade from transparent to opaque
- put on board

for better visibility