feat(dart/transform) Register parameter metadata information

Adds any metadata attached to a parameter to the "parameters" value
passed in to `registerType`.

For example:
`MyComponent(@Inject(Foo) foo)` generates
`"parameters": const [const [const Inject(Foo)]]`

Also reorganizes the testing code.

Closes #7

modules/angular2/test/transform/reflection_remover/all_tests.dart

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+library angular2.test.transform.reflection_remover;
+
+import 'package:analyzer/analyzer.dart';
+import 'package:angular2/src/transform/reflection_remover/codegen.dart';
+import 'package:angular2/src/transform/reflection_remover/rewriter.dart';
+import 'package:unittest/unittest.dart';
+
+import 'reflection_remover_files/expected/index.dart' as expected;
+import '../common/read_file.dart';
+
+void allTests() {
+  var codegen = new Codegen('web/index.dart', 'web/index.ngDeps.dart');
+
+  test('should remove uses of mirrors & insert calls to generated code', () {
+    var code =
+        readFile('reflection_remover/reflection_remover_files/index.dart');
+    var output =
+        new Rewriter(code, codegen).rewrite(parseCompilationUnit(code));
+    expect(output, equals(expected.code));
+  });
+}

modules/angular2/test/transform/reflection_remover/reflection_remover_files/README.md

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+Tests that the reflection removal step:
+ 1. Comments out the import of reflection_capabilities.dart
+ 2. Comments out the instantiation of `ReflectionCapabilities`
+ 3. Adds the appropriate import.
+ 4. Adds the call to `setupReflection`
+ 5. Does not change line numbers in the source.
+ 6. Makes minimal changes to source offsets.

modules/angular2/test/transform/reflection_remover/reflection_remover_files/expected/index.dart

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+library angular2.test.transform.reflection_remover_files;
+
+// This file is intentionally formatted as a string to avoid having the
+// automatic transformer prettify it.
+//
+// This file represents transformed user code. Because this code will be
+// linked to output by a source map, we cannot change line numbers from the
+// original code and we therefore add our generated code on the same line as
+// those we are removing.
+
+var code = """
+library web_foo;
+
+import 'package:angular2/src/core/application.dart';
+import 'package:angular2/src/reflection/reflection.dart';
+import 'package:angular2/src/reflection/reflection_capabilities.dart';import 'index.ngDeps.dart' as ngStaticInit;
+
+void main() {
+  reflector.reflectionCapabilities = new ReflectionCapabilities();ngStaticInit.setupReflection(reflector);
+  bootstrap(MyComponent);
+}
+""";

modules/angular2/test/transform/reflection_remover/reflection_remover_files/index.dart

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+library web_foo;
+
+import 'package:angular2/src/core/application.dart';
+import 'package:angular2/src/reflection/reflection.dart';
+import 'package:angular2/src/reflection/reflection_capabilities.dart';
+
+void main() {
+  reflector.reflectionCapabilities = new ReflectionCapabilities();
+  bootstrap(MyComponent);
+}