Implement dummy widget

app/src/main/res/layout/small_widget.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:orientation="vertical">
+
+    <ImageView
+        android:id="@+id/imageView"
+        android:layout_width="55dp"
+        android:layout_height="55dp"
+        />
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:shadowColor="#000000"
+        android:shadowDx="1"
+        android:shadowDy="1"
+        android:shadowRadius="3"
+        android:padding="6dp"
+        android:text="Widget"/>
+
+</LinearLayout>

app/src/main/res/layout/small_widget_preview.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<org.isoron.uhabits.views.SmallWidgetView xmlns:android="http://schemas.android.com/apk/res/android"
+              android:orientation="vertical"
+              android:layout_width="120dp"
+              android:layout_height="120dp">
+
+</org.isoron.uhabits.views.SmallWidgetView>

app/src/main/res/xml/small_widget_info.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+                    android:minHeight="40dp"
+                    android:minWidth="40dp"
+                    android:initialLayout="@layout/small_widget"
+                    android:previewImage="@mipmap/ic_small_widget_preview"
+                    android:resizeMode="none"
+                    android:updatePeriodMillis="3600000"
+                    android:widgetCategory="home_screen">
+
+
+</appwidget-provider>