Update meta and logging library descriptions; tweak fixnum

pkg/meta/lib/meta.dart

Index: pkg/meta/lib/meta.dart
diff --git a/pkg/meta/lib/meta.dart b/pkg/meta/lib/meta.dart
index 9960d59d02ff09f48bef612279e2b9d6f01f86ad..e3e4a250753c5b613716ce9f3c75b2298a663389 100644
--- a/pkg/meta/lib/meta.dart
+++ b/pkg/meta/lib/meta.dart
@@ -3,24 +3,21 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /**
- * This library contains the definitions of annotations that provide additional
- * semantic information about the program being annotated. These annotations are
- * intended to be used by tools to provide a better user experience.
+ * Constants for use in metadata annotations such as
+ * `@deprecated`, `@override`, and `@proxy`.
+ * 
+ * Annotations provide semantic information
+ * that tools can use to provide a better user experience.
+ * For example, an IDE might not autocomplete
+ * the name of a function that's been marked `@deprecated`,
+ * or it might display the function's name differently.
  *
- * ## Installing ##
- *
- * Use [pub][] to install this package. Add the following to your `pubspec.yaml`
- * file.
- *
- *     dependencies:
- *       meta: any
- *
- * Then run `pub install`.
- *
- * For more information, see the
- * [meta package on pub.dartlang.org](http://pub.dartlang.org/packages/meta).
- *
- * [pub]: http://pub.dartlang.org
+ * For information on installing and importing this library, see the
+ * [meta package on pub.dartlang.org]
+ * (http://pub.dartlang.org/packages/meta).
+ * For examples of using annotations, see
+ * [Metadata](https://www.dartlang.org/docs/dart-up-and-running/contents/ch02.html#ch02-metadata)
+ * in the language tour.
  */
 library meta;