Make NumberFormat use the ICU currency data, fix bug in NumberFormat

test/intl/number-format/check-minimum-fraction-digits.js

Index: test/intl/number-format/check-minimum-fraction-digits.js
diff --git a/test/intl/number-format/check-minimum-fraction-digits.js b/test/intl/number-format/check-minimum-fraction-digits.js
new file mode 100755
index 0000000000000000000000000000000000000000..57e65be55e22525322c457a45a4dfddc6ef373d1
--- /dev/null
+++ b/test/intl/number-format/check-minimum-fraction-digits.js
@@ -0,0 +1,9 @@
+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Make sure minimumFractionDigits is honored
+
+var nf = new Intl.NumberFormat("en-us",{ useGrouping: false, minimumFractionDigits: 4});
+
+assertEquals("12345.6789", nf.format(12345.6789));