doc: add help page, update project page

R=golang-dev, kyle, r, bradfitz
CC=golang-dev
https://golang.org/cl/5729053
diff --git a/doc/contrib.html b/doc/contrib.html
index e363469..76cee1f 100644
--- a/doc/contrib.html
+++ b/doc/contrib.html
@@ -3,19 +3,27 @@
 	"Path": "/project/"
 }-->
 
-<h2 id="the_go_project">The Go Project</h2>
+<div id="manual-nav"></div>
+
+<p>
+Go is an open source project developed by a team at
+<a href="http://google.com/">Google</a> and many
+<a href="/CONTRIBUTORS">contributors</a> from the open source community.
+</p>
+
+<p>
+Go is distributed under a <a href="/LICENSE">BSD-style license</a>.
+</p>
+
+<h2 id="resources">Developer Resources</h2>
 
 <h3 id="source"><a href="https://code.google.com/p/go/source">Source Code</a></h3>
 <p>Check out the Go source code.</p>
 
-<h3 id="build_status"><a href="http://build.golang.org/">Build Status</a></h3>
-<p>View the status of Go builds across the supported operating
-systems and architectures.</p>
-
 <h3 id="release"><a href="/doc/devel/release.html">Release History</a></h3>
 <p>A summary of the changes between Go releases.</p>
 
-<h3 id="release"><a href="/doc/devel/weekly.html">Weekly Snapshot History</a></h3>
+<h3 id="weekly"><a href="/doc/devel/weekly.html">Weekly Snapshot History</a></h3>
 <p>A summary of the changes between weekly snapshots of Go.</p>
 
 <h3 id="golang-dev"><a href="http://groups.google.com/group/golang-dev">Developer Mailing List</a></h3>
@@ -27,6 +35,11 @@
 <h3 id="golang-checkins"><a href="http://groups.google.com/group/golang-checkins">Checkins Mailing List</a></h3>
 <p>A mailing list that receives a message summarizing each checkin to the Go repository.</p>
 
+<h3 id="build_status"><a href="http://build.golang.org/">Build Status</a></h3>
+<p>View the status of Go builds across the supported operating
+systems and architectures.</p>
+
+
 <h2 id="howto">How you can help</h2>
 
 <h3><a href="http://code.google.com/p/go/issues">Reporting issues</a></h3>
@@ -59,3 +72,26 @@
 <a href="http://code.google.com/p/go/issues/list?q=status=HelpWanted">HelpWanted</a>
 are particularly in need of outside help.
 </p>
+
+
+<h2 id="community">The Go Community</h2>
+
+<h3 id="mailinglist"><a href="http://groups.google.com/group/golang-nuts">Go Nuts Mailing List</a></h3>
+<p>The <a href="http://groups.google.com/group/golang-nuts">golang-nuts</a> 
+mailing list is for general Go discussion.</p>
+
+<h3 id="projects"><a href="http://godashboard.appspot.com/project">Go Project Dashboard</a></h3>
+<p>A list of external Go projects including programs and libraries.</p>
+
+<h3 id="irc"><a href="irc:irc.freenode.net/go-nuts">Go IRC Channel</a></h3>
+<p><b>#go-nuts</b> on <b>irc.freenode.net</b> is the official Go IRC channel.</p>
+
+<h3 id="plus"><a href="https://plus.google.com/101406623878176903605/posts">The Go Programming Language at Google+</a></h3>
+<p>The Go project's Google+ page.</p>
+
+<h3 id="twitter"><a href="http://twitter.com/go_nuts">@go_nuts at Twitter</a></h3>
+<p>The Go project's official Twitter account.</p>
+
+<h3 id="blog"><a href="http://blog.golang.org/">The Go Blog</a></h3>
+<p>The official blog of the Go project, featuring news and in-depth articles by
+the Go team and guests.</p>