refactor and improve contact selection

* unify single and multi contact selection activities
* follow android listview design recommendations more closely
* add contact photos to selection
* change indicator for push to be more obvious
* cache circle-cropped bitmaps
* dedupe numbers when contact has multiple of same phone number

// FREEBIE

res/drawable/textlines.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
+    <item>
+        <shape android:shape="rectangle">
+            <solid android:color="#33000000" />
+        </shape>
+    </item>
+
+    <item android:bottom="1dp">
+        <shape
+            android:shape="rectangle">
+            <solid android:color="@color/white" />
+        </shape>
+    </item>
+
+</layer-list>