Create wrapper script around mojom's generate.dart in the Sky package.

sky/sdk/README.md

Index: sky/sdk/README.md
diff --git a/sky/sdk/README.md b/sky/sdk/README.md
index 99df55c673d80fe9e878c546e59d970b9248c349..ad7f17d23b706b2c6e270cf2b2cf8e54d4d117b7 100644
--- a/sky/sdk/README.md
+++ b/sky/sdk/README.md
@@ -36,11 +36,13 @@ adding a [pubspec.yaml](https://www.dartlang.org/tools/pub/pubspec.html):
 name: your_app_name
 dependencies:
  sky: any
+ mojom: '>=0.0.3 <1.0.0'

[eseidel, 2015/05/07 17:55:33]

Other than this line, the change looks fine.

[blundell, 2015/05/07 18:38:47]

What you suggested was my first thought as well. Unhappily, it turns out that
dart only lets you do "pub run" on executables that are in direct dependencies.

[sethladd, 2015/05/11 16:38:02]

If you want to run a Dart script from a package that is not a direct dependency,
there is one option:

1) globally install that package.

pub global activate foo

(if you then put ~/.pub-cache/bin into your PATH, you can then run those
scripts)


Meanwhile, I've opened https://code.google.com/p/dart/issues/detail?id=23426

 ```
 
 Once the pubspec is in place, create a `lib` directory (where your dart code
-will go) and run `pub get` to download all necessary dependencies and create
-the symlinks necessary for 'package:your_app_names/main.dart' includes to work.
+will go) and run the following:
+
+`pub get && pub run mojom:generate`.
 
 Currently the Sky Engine assumes the entry point for your application is a
 `main` function located inside a `main.sky` file at the root of the package.