add tool to verify dependency information

lib/info.dart

Index: lib/info.dart
diff --git a/lib/info.dart b/lib/info.dart
index d04b7966bd8e8c377856527e498eafdfd0a80054..d43f7210e1a4fb027884b5a26481018e8e8953ca 100644
--- a/lib/info.dart
+++ b/lib/info.dart
@@ -150,7 +150,7 @@ class AllInfo {
 
   AllInfo();
 
-  static AllInfo parseFromJson(Map map) => new _ParseHelper().parseAll(map);
+  factory AllInfo.fromJson(Map json) => new _ParseHelper().parseAll(json);

[Siggi Cherem (dart-lang), 2015/10/14 23:37:02]

since this is a breaking change, we might need to change the version to 0.2.0.

FWIW - I was hoping we remove it entirely once we split the serialization to be
outside of the info classes
(https://github.com/dart-lang/dart2js_info/issues/4), then all to/from json is
detached and we can support different encodings without changing the info API.

[Harry Terkelsen, 2015/10/15 00:13:55]

I added a TODO for this. Let's go with 0.2.0-dev and then roll when we have an
InfoCodec

 
   Map _listAsJsonMap(List<Info> list) {
     var map = <String, Map>{};