* WIP: contact listing / searching.

this is the first part, adding a cache for all the contacts in mails
  (~/.mu/cache/contacts), which is a .ini-type file.

src/tests/test-mu-cmd.c

@@ -110,7 +110,7 @@ test_mu_index (void)
 
 		xpath = g_strdup_printf ("%s%c%s", muhome, G_DIR_SEPARATOR, "xapian");
 	
-		store = mu_store_new (xpath, NULL);
+		store = mu_store_new (xpath, NULL, NULL);
 		g_assert (store);
 
 		g_assert_cmpuint (mu_store_count (store), ==, 5);