Get a car by his ID =>  ..../api/cars/{carID}
Merge branch 'master' of https://github.com/FlavienKnuchel/Teaching-COMEM-MWS

# By Yoann Gern (3) and FlavienKnuchel (1)
# Via FlavienKnuchel
* 'master' of https://github.com/FlavienKnuchel/Teaching-COMEM-MWS:
  debut de fonctions JS + proxy
  style
  API v.0.9
  API v.0.8