Adding basic models and dtos

Database.cs

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+using System;
+using System.ComponentModel.DataAnnotations;
+
+namespace dot_social.Database {
+  public class User {
+  }
+
+  public class Relationship {
+  }
+
+  public class Profile {
+  }
+
+  public class Location {
+  }
+
+  public class Tag {
+  }
+
+  public class Post {
+  }
+}

Models.cs

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+using System;
+
+namespace dot_social.Models {
+  public class UserDto {
+    public DateTime Date { get; set; }
+
+    public int TemperatureC { get; set; }
+
+    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
+
+    public string Summary { get; set; }
+  }
+
+  public class UserCollectionDto {
+  }
+
+  public class UserProfileDto {
+  }
+
+  public class TagDto {
+  }
+
+  public class TagCollectionDto {
+  }
+
+  public class PostDto {
+  }
+
+  public class PostCollectionDto {
+  }
+ }

journal/2020-01-08.goal.md

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+* [-] TODO: Create defintiions for data transfer objects (DTOs).
+  * [ ] Create model for `User` entity.
+  * [ ] Create model for `Post` entity.
+    * [ ] Decide whether or not a `Comment` entity is necessary.
+  * [ ] Create model for `Tag` entity.
+