Added link sharing (#30)

src/models/authTypes.json

@@ -0,0 +1,5 @@
+{
+  "UNKNOWN": 0,
+  "USER": 1,
+  "LINK_SHARE": 2
+}

src/models/linkShare.js

@@ -0,0 +1,27 @@
+import AbstractModel from './abstractModel'
+import UserModel from './user'
+
+export default class ListModel extends AbstractModel {
+
+    constructor(data) {
+        // The constructor of AbstractModel handles all the default parsing.
+        super(data)
+
+        this.shared_by = new UserModel(this.shared_by)
+    }
+
+    // Default attributes that define the "empty" state.
+    defaults() {
+        return {
+            id: 0,
+            hash: '',
+            right: 0,
+            shared_by: UserModel,
+            sharing_type: 0,
+            listID: 0,
+
+            created: 0,
+            updated: 0,
+        }
+    }
+}