fixes #219, able to compile multiple entry points

test/dependency_graph_test.dart

Index: test/dependency_graph_test.dart
diff --git a/test/dependency_graph_test.dart b/test/dependency_graph_test.dart
index b5810970dc2a8a6a2b04d3573e314ab1d49676c8..a27afb2e64f040413a92db6c5379bafecc7b5226 100644
--- a/test/dependency_graph_test.dart
+++ b/test/dependency_graph_test.dart
@@ -7,14 +7,16 @@ library dev_compiler.test.dependency_graph_test;
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:path/path.dart' as path;
 import 'package:test/test.dart';
 
 import 'package:dev_compiler/src/analysis_context.dart';
+import 'package:dev_compiler/src/compiler.dart';
 import 'package:dev_compiler/src/options.dart';
-import 'package:dev_compiler/src/dependency_graph.dart';
 import 'package:dev_compiler/src/report.dart';
-import 'package:dev_compiler/src/testing.dart';
-import 'package:path/path.dart' as path;
+import 'package:dev_compiler/src/server/dependency_graph.dart';
+
+import 'testing.dart';
 
 void main() {
   var options = new CompilerOptions(