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

src/org/thoughtcrime/securesms/util/DirectoryHelper.java

@@ -2,7 +2,9 @@ package org.thoughtcrime.securesms.util;
 
 import android.content.Context;
 import android.util.Log;
+import android.widget.Toast;
 
+import org.thoughtcrime.securesms.R;
 import org.thoughtcrime.securesms.push.PushServiceSocketFactory;
 import org.thoughtcrime.securesms.recipients.Recipient;
 import org.whispersystems.textsecure.directory.Directory;
@@ -19,6 +21,37 @@ import java.util.Set;
 public class DirectoryHelper {
   private static final String TAG = DirectoryHelper.class.getSimpleName();
 
+  public static void refreshDirectoryWithProgressDialog(final Context context) {
+    refreshDirectoryWithProgressDialog(context, null);
+  }
+
+  public static void refreshDirectoryWithProgressDialog(final Context context, final DirectoryUpdateFinishedListener listener) {
+    if (!TextSecurePreferences.isPushRegistered(context)) {
+      Toast.makeText(context.getApplicationContext(),
+                     context.getString(R.string.SingleContactSelectionActivity_you_are_not_registered_with_the_push_service),
+                     Toast.LENGTH_LONG).show();
+      return;
+    }
+
+    new ProgressDialogAsyncTask<Void,Void,Void>(context,
+                                                R.string.SingleContactSelectionActivity_updating_directory,
+                                                R.string.SingleContactSelectionActivity_updating_push_directory)
+    {
+      @Override
+      protected Void doInBackground(Void... voids) {
+        DirectoryHelper.refreshDirectory(context.getApplicationContext());
+        return null;
+      }
+
+      @Override
+      protected void onPostExecute(Void aVoid) {
+        super.onPostExecute(aVoid);
+        if (listener != null) listener.onUpdateFinished();
+      }
+    }.execute();
+
+  }
+
   public static void refreshDirectory(final Context context) {
     refreshDirectory(context, PushServiceSocketFactory.create(context));
   }
@@ -63,4 +96,8 @@ public class DirectoryHelper {
       return false;
     }
   }
+
+  public static interface DirectoryUpdateFinishedListener {
+    public void onUpdateFinished();
+  }
 }