Endpoints for authentication, articles, order management and organisation creation

[gtindo]

• Github authentication (/auth)
• View account informations (/user/{userId})
• Deactivate an account (/user/{userId}/deactivate
• Create an organisation (POST
  /organisations)
• List organisations (GET /organisations)
• View an organisation shop (GET /articles)
• List articles (GET /articles)
• View details of an article (GET /articles/{articleId})
• Create an order (/orders) #54
• Pay an order (/orders/{orderId}/pay) #55
• Create/Update an article (Admin) (/articles && /articles/{articleId})
• List orders (Admin) (/orders) #56
• Process an order (Admin) (/orders/{orderId}/process) #57