Copy all of dart_sky.dart's supporting files into package:sky

Also bumped package:sky's version in prep for publishing.

R=abarth@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1024243002

sdk/packages/sky/CHANGELOG.md

+## 0.0.2
+
+  - sdk_additions now includes previously missing imports.
+  - added lib/sky_tool, and supporting apks/SkyDemo.apk

sdk/packages/sky/pubspec.yaml

@@ -2,6 +2,6 @@ name: sky
 author: Chromium Authors <sky-dev@googlegroups.com>
 description: Dart files to support executing inside Sky.
 homepage: https://github.com/domokit/mojo/tree/master/sky
-version: 0.0.1
+version: 0.0.2
 dependencies:
   mojo: '>=0.0.1 <1.0.0'

tools/deploy_sdk.py

@@ -171,9 +171,9 @@ def main():
     copy_or_link(src_path('sky/engine/bindings/builtin.dart'),
         sdk_path('packages/sky/sdk_additions/dart_sky_builtins.dart'))
     bindings_path = os.path.join(build_dir, 'gen/sky/bindings')
-    copy_or_link(os.path.join(bindings_path, 'dart_sky.dart'),
-        sdk_path('packages/sky/sdk_additions/dart_sky.dart'))
-
+    # dart_sky.dart has many supporting files:
+    copy_or_link(bindings_path, sdk_path('packages/sky/sdk_additions'),
+        dart_filter)
 
     # Mojo package, lots of overlap with gen, must be copied:
     copy(src_path('mojo/public'), sdk_path('packages/mojo/lib/public'),