stddoclet: Add links from packages, classes and members to online examples

Improving the ability to find examples is one of the most highly
requested features of developers using our website according to
Sun studies. We can take a giant step toward fixing this for the J2SE
by adding links to online examples.

Proposal:
In javadoc, we add links called "See examples" in three places:

  1) in a package description
  2) in a class description
  3) in a member description

Not all packages, classes, or member will have a "see examples"
link -- only ones with examples.

If you click on a link, you'll see a page that sorta looks like:

  Java Tutorial
     How to blah, blah...
     Looking at blah, blah...
     Finding the blah, blah...
     See all X matches

  Java Almanac
     e423. Quintessential Regular Expression Search Program
     e424. Determining If a String Matches a Pattern Exactly
     e425. Applying Regular Expressions on the Contents of a File
     e426. Removing Duplicate Whitespace in a String
     e427. Greedy and Nongreedy Matching in a Regular Expression
     e428. Escaping Special Characters in a Pattern
     See all X matches

  Tech Tips
     ....
     ....
     See all X matches