New: Delete functionality for Projects and additional fields

coscine/issues#261

src/Project/Controllers/DisciplineController.cs

+using Coscine.Api.Project.Models;
+using Coscine.Api.Project.ReturnObjects;
+using Coscine.ApiCommons;
+using Microsoft.AspNetCore.Mvc;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Coscine.Api.Project.Controllers
+{
+    public class DisciplineController : Controller
+    {
+        private readonly Authenticator _authenticator;
+        private readonly DisciplineModel _disciplineModel;
+
+        public DisciplineController()
+        {
+            _authenticator = new Authenticator(this, Program.Configuration);
+            _disciplineModel = new DisciplineModel();
+        }
+
+        [Route("[controller]")]
+        public IActionResult Index()
+        {
+            return Ok(_authenticator.ValidateAndExecute((user) =>
+            {
+                return _disciplineModel.GetAll().Select((discipline) => new DisciplineObject(discipline.Id, discipline.Url, discipline.DisplayName));
+            }));
+        }
+    }
+}