Rev package versions for release.

sky_engine is now at 0.0.45
sky_services is now at 0.0.45
flx is now at 0.0.4
flutter is now at 0.0.15
flutter_sprites is now at 0.0.12

examples/address_book/pubspec.yaml

 name: address_book
 dependencies:
   flutter: 
-    '0.0.14'
+    '0.0.15'
   sky_tools: any
 dependency_overrides:
   material_design_icons:

examples/fitness/pubspec.yaml

 name: fitness
 dependencies:
   flutter: 
-    '0.0.14'
+    '0.0.15'
   playfair: ^0.0.10
   path: ^1.3.6
   sky_tools: any

examples/game/pubspec.yaml

 name: asteroids
 dependencies:
   flutter: 
-    '0.0.14'
+    '0.0.15'
   sky_tools: any
   flutter_sprites: 
-    '0.0.11'
+    '0.0.12'
   box2d: any
 dependency_overrides:
   material_design_icons:

examples/hello_world/pubspec.yaml

 name: hello_world
 dependencies:
   flutter: 
-    '0.0.14'
+    '0.0.15'
   sky_tools: any
 dependency_overrides:
   material_design_icons:

examples/mine_digger/pubspec.yaml

 name: mine_digger
 dependencies:
   flutter: 
-    '0.0.14'
+    '0.0.15'
   sky_tools: any
 dependency_overrides:
   material_design_icons:

examples/raw/pubspec.yaml

 name: sky_raw_examples
 dependencies:
   flutter: 
-    '0.0.14'
+    '0.0.15'
   sky_tools: any
 dependency_overrides:
   material_design_icons:

examples/rendering/pubspec.yaml

 name: flutter_rendering_examples
 dependencies:
   flutter: 
-    '0.0.14'
+    '0.0.15'
   sky_tools: any
 dependency_overrides:
   material_design_icons:

examples/stocks/pubspec.yaml

 name: stocks
 dependencies:
   flutter: 
-    '0.0.14'
+    '0.0.15'
   sky_tools: any
 dependency_overrides:
   material_design_icons:

examples/widgets/pubspec.yaml

 name: sky_widgets_examples
 dependencies:
   flutter: 
-    '0.0.14'
+    '0.0.15'
   sky_tools: any
   flutter_rendering_examples: any
 dependency_overrides:

packages/flutter/pubspec.yaml

 name: flutter
-version: 0.0.14
+version: 0.0.15
 author: Flutter Authors <flutter-dev@googlegroups.com>
 description: A framework for writing Flutter applications
 homepage: http://flutter.io
@@ -10,10 +10,10 @@ dependencies:
   mojo_sdk: 0.1.0
   newton: '>=0.1.4 <0.2.0'
   sky_engine: 
-    '0.0.44'
+    '0.0.45'
   sky_services: 
-    '0.0.44'
-  sky_tools: '>=0.0.28 <0.1.0'
+    '0.0.45'
+  sky_tools: '>=0.0.30 <0.1.0'
   vector_math: '>=1.4.3 <2.0.0'
 environment:
   sdk: '>=1.12.0 <2.0.0'

packages/flutter_sprites/pubspec.yaml

 name: flutter_sprites
 description: A sprite toolkit built on top of Flutter
-version: 0.0.11
+version: 0.0.12
 author: Flutter Authors <flutter-dev@googlegroups.com>
 homepage: http://flutter.io
 dependencies:
   flutter: 
-    '0.0.14'
+    '0.0.15'
   box2d: ">=0.2.0 <0.3.0"

packages/flx/pubspec.yaml

 name: flx
-version: 0.0.3
+version: 0.0.4
 author: Flutter Authors <flutter-dev@googlegroups.com>
 description: Library for dealing with Flutter bundle (.flx) files
 homepage: http://flutter.io
 dependencies:
   sky_services: 
-    '0.0.44'
+    '0.0.45'
   yaml: ^2.1.3
   asn1lib: ^0.4.1
   cipher: ^0.7.1

packages/unit/pubspec.yaml

 name: sky_unit_tests
 dependencies:
   flutter: 
-    '0.0.14'
+    '0.0.15'
   sky_tools: any
   test: any
   quiver: any

packages/updater/pubspec.yaml

@@ -5,13 +5,13 @@ homepage: http://flutter.io
 dependencies:
   mojo: 0.3.0
   flutter: 
-    '0.0.14'
+    '0.0.15'
   sky_services: ^0.0.40
   yaml: ^2.1.3
   path: ^1.3.0
   flx: 0.0.1
   flutter_sprites:
-    '0.0.11'
+    '0.0.12'
 dependency_overrides:
   flutter:
     path: ../sky