Expose word list of MnemonicCode. It's useful for auto-completion.

core/src/main/java/com/google/bitcoin/crypto/MnemonicCode.java

@@ -1,5 +1,6 @@
 /*
  * Copyright 2013 Ken Sedgwick
+ * Copyright 2014 Andreas Schildbach
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -79,6 +80,13 @@ public class MnemonicCode {
         }
     }
 
+    /**
+     * Gets the word list this code uses.
+     */
+    public List<String> getWordList() {
+        return wordList;
+    }
+
     /**
      * Convert mnemonic word list to seed.
      */