add way more friend shit (#815)

src/structures/User.js

@@ -135,6 +135,38 @@ class User {
     return this.client.rest.methods.deleteChannel(this);
   }
 
+  /**
+   * Sends a friend request to the user
+   * @returns {Promise<User>}
+   */
+  addFriend() {
+    return this.client.rest.methods.addFriend(this);
+  }
+
+  /**
+   * Removes the user from your friends
+   * @returns {Promise<User>}
+   */
+  removeFriend() {
+    return this.client.rest.methods.removeFriend(this);
+  }
+
+  /**
+   * Blocks the user
+   * @returns {Promise<User>}
+   */
+  block() {
+    return this.client.rest.methods.blockUser(this);
+  }
+
+  /**
+   * Unblocks the user
+   * @returns {Promise<User>}
+   */
+  unblock() {
+    return this.client.rest.methods.unblockUser(this);
+  }
+
   /**
    * Checks if the user is equal to another. It compares username, ID, discriminator, status and the game being played.
    * It is recommended to compare equality by using `user.id === user2.id` unless you want to compare all properties.