created/padded out the GroupController to simply Get and Create groups.

#59

DataCenter_Windows/WindowsDataCenter/WindowsDataCenter/Controllers/GroupController.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Web.Http;
+using Interfaces;
+
+namespace WindowsDataCenter
+{
+    [RoutePrefix("api/groups")]
+    public class GroupController:ApiController
+    {
+        private IRepository _repo;
+        public GroupController(IRepository repo)
+        {
+            if(repo == null) throw new ArgumentNullException(nameof(repo));
+            _repo = repo;
+        }
+
+        [HttpGet]
+        [Route("")]
+        public IHttpActionResult GetGroups()
+        {
+            var groups = _repo.GetGroups();
+            return Ok(groups);
+        }
+
+        [HttpPost]
+        [Route("create")]
+        public IHttpActionResult CreateGroup([FromBody] Group group)
+        {
+            var groupId = -1;
+            var resp = _repo.CreateGroup(group, out groupId);
+
+            return Ok(groupId);
+        }
+    }
+}