Fixes #10

• Define a schema to handle questions. (Needs to be discussed)
• Define the API. (Same)

auteur has the following properties:

"auteur":{
  "identite":{"acteurRef":"PA721062","mandatRef":"PM723158"},
  "groupe":{"organeRef":"PO730958","abrege":"FI","developpe":"La France insoumise"}
}

Shall we reference acteur_id, mandat_id or both? Shall I include group_id?

Each question contains data relative to its "cloture"

"cloture":{
   "codeCloture":"REP_PUB",
   "libelleCloture":"R\u00e9ponse publi\u00e9e",
   "dateCloture":"13/12/2017",
   "infoJO":{"typeJO":"JO_DEBAT","dateJO":"13/12/2017","pageJO":"6377"}
}

What does it exactly mean?

Each text (question/response) has also information related to the JO

"infoJO":{"typeJO":"JO_DEBAT","dateJO":"13/12/2017"}

Shall I include that aswell?