Adding Angular's DI package & Dart unittests which test it.

third_party/pkg/di/package.json

Index: third_party/pkg/di/package.json
diff --git a/third_party/pkg/di/package.json b/third_party/pkg/di/package.json
new file mode 100644
index 0000000000000000000000000000000000000000..9a1daf2ea96438dab89c7b846d65e6d3de73b294
--- /dev/null
+++ b/third_party/pkg/di/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "dart-di",
+  "version": "0.0.0",
+  "description": "A prototype of Dependency Injection framework.",
+  "main": "index.js",
+  "dependencies": {},
+  "devDependencies": {
+    "grunt": "~0.4",
+    "grunt-contrib-watch": "~0.3"
+  },
+  "scripts": {
+    "test": "grunt dart:test"
+  },
+  "bugs": {
+    "url": "https://github.com/angular/di.dart/issues"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/angular/di.dart.git"
+  },
+  "author": "Vojta Jina <vojta.jina@gmail.com>",
+  "license": "MIT"
+}