Fixed main screen buttons.

res/layout/main_tile_join.xml

@@ -2,9 +2,15 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/main_menu_join"
     style="@style/MetroTile"
-    android:background="@drawable/blimed"
     android:onClick="joinButton" >
 
+    <ImageView 
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:src="@drawable/blimed"
+        android:layout_centerInParent="true"
+        android:scaleType="fitCenter" />
+    
     <TextView
         style="@style/MetroTileText_bg"
         android:layout_width="fill_parent"

res/layout/main_tile_news.xml

@@ -2,9 +2,14 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/main_menu_news"
     style="@style/MetroTile"
-    android:background="@drawable/nyheter"
     android:onClick="newsButton" >
 
+    <ImageView 
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:src="@drawable/nyheter"
+        android:layout_centerInParent="true"
+        android:scaleType="fitCenter" />
     <TextView
         style="@style/MetroTileText_bg"
         android:layout_width="fill_parent"

res/layout/main_tile_program.xml

@@ -2,9 +2,15 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/main_menu_program"
     style="@style/MetroTile"
-    android:background="@drawable/program"
     android:onClick="programButton" >
 
+    <ImageView 
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:src="@drawable/program"
+        android:layout_centerInParent="true"
+        android:scaleType="fitCenter" />
+    
     <TextView
         style="@style/MetroTileText_bg"
         android:layout_width="fill_parent"

res/layout/main_tile_tickets.xml

@@ -2,9 +2,15 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/main_menu_tickets"
     style="@style/MetroTile"
-    android:background="@drawable/billett"
     android:onClick="ticketButton" >
 
+    <ImageView 
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:src="@drawable/billett"
+        android:layout_centerInParent="true"
+        android:scaleType="fitCenter" />
+    
     <TextView
         style="@style/MetroTileText_bg"
         android:layout_width="fill_parent"