doc: update contrib.html to be more enticing

doc: refer to golang-dev instead of -nuts in contribute.html

R=r, rsc
CC=golang-dev
https://golang.org/cl/4309043

doc/contrib.html

@@ -2,21 +2,38 @@
 
 <div class="left-column">
 
-<h2 id="developer_info">Resources for Developers</h2>
+<h2 id="howto">How you can help</h2>
 
-<h3 id="issuetracker"><a href="http://code.google.com/p/go/issues">Issue Tracker</a></h3>
-<p>Having an issue with Go? Check the tracker to see if it's a known issue.</p>
-<p>If your issue is not listed, please file a <a
-href="http://code.google.com/p/go/issues/entry">bug report</a>.</p>
+<h3>Reporting issues</h3>
 
-<h3 id="build_status"><a href="http://godashboard.appspot.com/">Build Status</a></h3>
-<p>View the status of Go builds across the supported operating
-systems and architectures.</p>
+<p>
+If you spot bugs, mistakes, or inconsistencies in the Go project's code or
+documentation, please let us know by
+<a href="http://code.google.com/p/go/issues/entry">filing a ticket</a>
+on our <a href="http://code.google.com/p/go/issues">issue tracker</a>.
+(Of course, you should check it's not an existing issue before creating
+a new one.)
+</p>
+
+<p>
+We pride ourselves on being meticulous; no issue is too small.
+</p>
+
+<h3>Contributing code</h3>
 
-<h3 id="contibute"><a href="contribute.html">Contribution Guidelines</a></h3>
-<p>So, you want to contribute code to the Go project? That's great!</p>
-<p>The first step is to read these contributions guidelines for information on 
-design, testing, and our code review process.</p>
+<p>
+Go is an open source project and we welcome contributions from the community.
+</p>
+<p>
+To get started, read these <a href="contribute.html">contribution
+guidelines</a> for information on design, testing, and our code review process.
+</p>
+<p>
+Check <a href="http://code.google.com/p/go/issues">the tracker</a> for 
+open issues that interest you. Those labeled
+<a href="http://code.google.com/p/go/issues/list?q=status=HelpWanted">HelpWanted</a>
+are particularly in need of outside help.
+</p>
 
 </div>
 
@@ -24,6 +41,10 @@ design, testing, and our code review process.</p>
 
 <h2 id="">The Go Project</h2>
 
+<h3 id="build_status"><a href="http://godashboard.appspot.com/">Build Status</a></h3>
+<p>View the status of Go builds across the supported operating
+systems and architectures.</p>
+
 <h3 id="roadmap"><a href="devel/roadmap.html">Roadmap</a></h3>
 <p>Features and ideas being developed or discussed by the Go team.</p>