Added icons for iOS. Broke out data access into repositories. Added syncing service.

src/App/Repositories/FolderRepository.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Bit.App.Abstractions;
+using Bit.App.Models.Data;
+
+namespace Bit.App.Repositories
+{
+    public class FolderRepository : Repository<FolderData, string>, IFolderRepository
+    {
+        public FolderRepository(ISqlService sqlService)
+            : base(sqlService)
+        { }
+
+        public Task<IEnumerable<FolderData>> GetAllByUserIdAsync(string userId)
+        {
+            var folders = Connection.Table<FolderData>().Where(f => f.UserId == userId).Cast<FolderData>();
+            return Task.FromResult(folders);
+        }
+    }
+}