convert entity classes to Kotlin data classes (#526)

* convert entity classes to Kotlin data classes

* more data classes, code style

app/src/main/java/com/keylesspalace/tusky/entity/Card.kt

@@ -0,0 +1,44 @@
+/* Copyright 2017 Andrew Dawson
+ *
+ * This file is a part of Tusky.
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+package com.keylesspalace.tusky.entity
+
+import android.os.Parcelable
+import kotlinx.android.parcel.Parcelize
+
+@Parcelize
+data class Card(
+        val url: String,
+        val title: String,
+        val description: String,
+        val image: String,
+        val type: String,
+        val width: Int,
+        val height: Int
+) : Parcelable {
+
+    override fun hashCode(): Int {
+        return url.hashCode()
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (other !is Card) {
+            return false
+        }
+        val account = other as Card?
+        return account?.url == this.url
+    }
+
+}