Re-land r29957 (add versions and constraints for packages and samples…

…), with

SDK constraints bumped from 1.0.0 to 0.8.10+6 .

R=ricow@google.com, sigmund@google.com

Review URL: https://codereview.chromium.org//62473002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/watcher@29986 260f80e4-7a28-3924-810f-c04153c831b5

pkgs/watcher/pubspec.yaml

@@ -1,13 +1,16 @@
 name: watcher
+version: 0.9.0
 author: "Dart Team <misc@dartlang.org>"
 homepage: http://www.dartlang.org
 description: >
   A file watcher. It monitors (currently by polling) for changes to contents
   of directories and notifies you when files have been added, removed, or
   modified.
 dependencies:
-  crypto: any
-  path: any
+  crypto: ">=0.9.0 <0.10.0"
+  path: ">=0.9.0 <0.10.0"
 dev_dependencies:
-  scheduled_test: any
-  unittest: any
+  scheduled_test: ">=0.9.0 <0.10.0"
+  unittest: ">=0.9.0 <0.10.0"
+environment:
+  sdk: ">=0.8.10+6 <2.0.0"