Added landscape layout for tablets

app/src/main/res/layout-sw720dp-land/activity_main.xml

+<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:app="http://schemas.android.com/apk/res-auto"
+  xmlns:tools="http://schemas.android.com/tools"
+  android:id="@+id/drawerLayout"
+  android:layout_width="match_parent"
+  android:layout_height="match_parent"
+  android:fitsSystemWindows="true">
+  <LinearLayout
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="horizontal">
+
+    <fragment
+      android:id="@+id/fragment_chat_list"
+      android:name="de.kuschku.quasseldroid_ng.ui.chat.buffers.BufferViewConfigFragment"
+      android:layout_width="320dp"
+      android:layout_height="match_parent"
+      tools:layout="@layout/fragment_chat_list" />
+
+    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto"
+      android:layout_width="match_parent"
+      android:layout_height="match_parent"
+      android:fitsSystemWindows="true"
+      android:orientation="vertical">
+
+      <android.support.design.widget.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="?attr/actionBarTheme">
+
+        <FrameLayout
+          android:layout_width="match_parent"
+          android:layout_height="?attr/actionBarSize">
+
+          <android.support.v7.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:contentInsetStartWithNavigation="0dp"
+            app:popupTheme="@style/Widget.PopupOverlay">
+
+            <fragment
+              android:id="@+id/fragment_toolbar"
+              android:name="de.kuschku.quasseldroid_ng.ui.chat.ToolbarFragment"
+              android:layout_width="fill_parent"
+              android:layout_height="fill_parent"
+              tools:layout="@layout/fragment_toolbar" />
+
+          </android.support.v7.widget.Toolbar>
+
+          <de.kuschku.quasseldroid_ng.util.ui.MaterialContentLoadingProgressBar
+            android:id="@+id/progressBar"
+            style="@style/Widget.MaterialProgressBar.ProgressBar.Horizontal.NoPadding"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="bottom"
+            app:mpb_progressStyle="horizontal"
+            app:mpb_setBothDrawables="true"
+            app:mpb_useIntrinsicPadding="false"
+            tools:indeterminate="true" />
+        </FrameLayout>
+
+      </android.support.design.widget.AppBarLayout>
+
+      <fragment
+        android:id="@+id/fragment_messages"
+        android:name="de.kuschku.quasseldroid_ng.ui.chat.messages.MessageListFragment"
+        android:layout_width="match_parent"
+        android:layout_height="0dip"
+        android:layout_weight="1"
+        tools:layout="@layout/fragment_messages" />
+
+      <fragment
+        android:id="@+id/fragment_editor"
+        android:name="de.kuschku.quasseldroid_ng.ui.chat.EditorFragment"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        tools:layout="@layout/fragment_editor" />
+
+    </LinearLayout>
+  </LinearLayout>
+
+  <fragment
+    android:id="@+id/fragment_nick_list"
+    android:name="de.kuschku.quasseldroid_ng.ui.chat.NickListFragment"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:layout_gravity="end"
+    tools:layout="@layout/fragment_nick_list" />
+</android.support.v4.widget.DrawerLayout>