Major look'n'feel update. Icons and buttons added to the drawer. Code cleanup.

app/src/main/res/drawable/ic_launcher_background.xml

@@ -1,8 +0,0 @@
-<shape xmlns:android="http://schemas.android.com/apk/res/android"
-    android:shape="rectangle">
-    <gradient
-        android:angle="270"
-        android:endColor="#181818"
-        android:startColor="@color/surfaceDark"
-        android:type="linear" />
-</shape>