Colors instead of png used for conference affiliation drawables.

app/src/main/res/drawable/ic_affilation.xml → app/src/main/res/drawable/ic_affiliation.xml

@@ -14,23 +14,23 @@
 -->
 <level-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item
-        android:drawable="@drawable/ic_affilation_none"
+        android:drawable="@android:color/transparent"
         android:minLevel="0"
         android:maxLevel="0" />
     <item
-        android:drawable="@drawable/ic_affilation_member"
+        android:drawable="@color/green_A400"
         android:minLevel="1"
         android:maxLevel="1" />
     <item
-        android:drawable="@drawable/ic_affilation_admin"
+        android:drawable="@color/amber_A100"
         android:minLevel="2"
         android:maxLevel="2" />
     <item
-        android:drawable="@drawable/ic_affilation_owner"
+        android:drawable="@color/deep_orange_A100"
         android:minLevel="3"
         android:maxLevel="3" />
     <item
-        android:drawable="@drawable/ic_affilation_outcast"
+        android:drawable="@android:color/transparent"
         android:minLevel="4"
         android:maxLevel="4" />
 </level-list>
\ No newline at end of file

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

@@ -38,7 +38,7 @@
         android:layout_height="@dimen/avatar_size_toolbar"
         android:layout_marginLeft="2dip"
         android:scaleType="fitXY"
-        android:src="@drawable/ic_affilation"
+        android:src="@drawable/ic_affiliation"
         />
 
     <RelativeLayout