Adding Travis CI and Coveralls support

test/test_util.dart

+// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library dev_compiler.test.test_util;
+
+import 'dart:io';
+
+import 'package:unittest/compact_vm_config.dart';
+import 'package:unittest/unittest.dart';
+
+void configureTest() {
+  if (!Platform.environment.containsKey('COVERALLS_TOKEN')) {
+    groupSep = " > ";
+    useCompactVMConfiguration();
+  }
+}