Single activity approach (#30)

* CircleCI config fixes

* Implicit deeplinking via navController navigate

* Removed jacoco.exec files. Closes # 32

app/src/main/AndroidManifest.xml

@@ -1,4 +1,5 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+<manifest
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     package="com.melih.rocketscience">
 
@@ -13,5 +14,15 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme"
-        tools:ignore="GoogleAppIndexingWarning" />
+        tools:ignore="GoogleAppIndexingWarning">
+
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+            <nav-graph android:value="@navigation/nav_main" />
+        </activity>
+    </application>
 </manifest>