Refactored Volume to have Name and Number (int) so that we can properly sort and still handle possible split volumes.

Refactored ScanLibrary into Library controller and updated it so it adds the new library to all admins.

API/Data/UserRepository.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
+using API.Constants;
 using API.DTOs;
 using API.Entities;
 using API.Interfaces;
@@ -55,6 +56,11 @@ namespace API.Data
                 .SingleOrDefaultAsync(x => x.UserName == username);
         }
 
+        public async Task<IEnumerable<AppUser>> GetAdminUsersAsync()
+        {
+            return await _userManager.GetUsersInRoleAsync(PolicyConstants.AdminRole);
+        }
+
         public async Task<IEnumerable<MemberDto>> GetMembersAsync()
         {
             return await _userManager.Users