Extract TextSecure strings for i18n.

1) Change all instances which use concatenation to build strings
with variables in them to use string formatting instead.

2) Extract all string literals from layouts and menus into strings.xml

3) Extract all string literals from code into strings.xml

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

@@ -1,6 +1,6 @@
-/** 
+/**
  * Copyright (C) 2011 Whisper Systems
- * 
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -10,7 +10,7 @@
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
@@ -26,7 +26,7 @@ public class Dialogs {
     alertDialog.setTitle(title);
     alertDialog.setMessage(message);
     alertDialog.setIcon(icon);
-    alertDialog.setPositiveButton("Ok", null);
+    alertDialog.setPositiveButton(android.R.string.ok, null);
     alertDialog.show();
   }
 }