wip: finish converting some more projects

Habittodo.Model/Todoist/Due.cs

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+using Newtonsoft.Json;
+
+namespace Habittodo.Model.Todoist
+{
+    public class Due
+    {
+        [JsonProperty("date")]
+        public string Date { get; set; }
+        [JsonProperty("timezone")]
+        public string Timezone { get; set; }
+        [JsonProperty("string")]
+        public string @String { get; set; }
+
+        public string ToJavaScriptDateStr()
+        {
+            try { return Date + "T00:00:00.000Z"; } catch { }
+            return null;
+        }
+    }
+}

Habittodo.Model/Todoist/Item.cs

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+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Habittodo.Model.Todoist
+{
+    public class Item
+    {
+        [JsonProperty("id")]
+        public string Id { get; set; }
+        [JsonProperty("content")]
+        public string Content { get; set; }
+        [JsonProperty("due")]
+        public Due Due { get; set; }
+        [JsonProperty("priority")]
+        public int Priority { get; set; }
+        [JsonProperty("parent_id")]
+        public string Parent_Id { get; set; }
+        [JsonProperty("is_deleted")]
+        public int Is_deleted { get; set; }
+        [JsonProperty("project_id")]
+        public string Project_id { get; set; }
+        [JsonProperty("date_completed")]
+        public string Date_completed { get; set; }
+
+        /// <summary>
+        /// This field will always be false when an item is marked as deleted
+        /// </summary>
+        [JsonIgnore]
+        public bool IsChild => !string.IsNullOrEmpty(Parent_Id);
+    }
+}

Habittodo.Model/Todoist/Responses/SyncResponse.cs

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+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Habittodo.Model.Todoist.Responses
+{
+    public class SyncResponse
+    {
+        [JsonProperty("sync_token")]
+        public string Sync_token { get; set; }
+        [JsonProperty("full_sync")]
+        public bool Full_sync { get; set; }
+        [JsonProperty("items")]
+        public List<Item> Items { get; set; }
+    }
+}