update readme

README.md

@@ -10,8 +10,11 @@ Goals
 * Help out those new to RubyGems get started and get things done
 * Make it easy to contribute more guides
 
-Todo
-====
+Want to help?
+=============
+
+If a guide is empty, start filling it out! Or, make a new one! Pull requests
+are gladly accepted!
 
 * Port content from docs.rubygems.org
 * Port content from rubygems.org/pages/docs
@@ -24,10 +27,24 @@ Setup
 
 Make sure you have jekyll installed (`gem install jekyll`), and run:
 
-  $ jekyll --server
+    $ jekyll --server
 
 The pages will be available at http://localhost:4000/
 
+Every guide except for the Command and Specification Reference is just a
+straight up markdown page, so just go edit it!
+
+For the Command Guide (`command-reference.md`), edit `command-reference.erb`
+and run:
+
+    $ rake command_guide
+
+For the Specification Guide, the documentation comes directly from the
+`Gem::Specification` class in RubyGems. Edit it, set your `RUBYGEMS_DIR` to
+where your code directory is, and run:
+
+    $ RUBYGEMS_DIR=~/Dev/ruby/rubygems rake spec_guide --trace
+
 Thanks
 ======