init postman

packages/postman/lib/postman.dart

@@ -0,0 +1,8 @@
+/// Support for doing something awesome.
+///
+/// More dartdocs go here.
+library;
+
+export 'src/postman_base.dart';
+
+// TODO: Export any libraries intended for clients of this package.

packages/postman/lib/src/postman_base.dart

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+// TODO: Put public facing types in this file.
+
+/// Checks if you are awesome. Spoiler: you are.
+class Awesome {
+  bool get isAwesome => true;
+}