Welcome to Cloud Jim, try to keep up
 
Error Message:
/var/lib/gems/1.8/gems/execjs-1.2.9/lib/execjs/runtimes.rb:47:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)

Add following to the Gemfile:
gem 'therubyracer'
 
Root Cause: mysql was not binding to 127.0.0.1
$sudo vi /etc/mysql/my.cnf
bind-address = 127.0.0.1
 
Invalid gemspec in [/var/lib/gems/1.8/specifications/paperclip-2.4.5.gemspec]: invalid date format in specification: 
"2011-10-21 00:00:00.000000000Z"

$sudo vi /var/lib/gems/1.8/specifications/paperclip-2.4.5.gemspec

change below line
  s.date = %q{2011-10-21 00:00:00.000000000Z}
to 
  s.date = %q{2011-10-21}
 
cp /var/lib/gems/1.8/gems/web-app-theme-0.8.0/spec/dummy/public/images/* app/assets/images/web-app-theme/ -r
 
/app/views/layouts/application.html.erb
- <%= javascript_include_tag :defaults, :cache => true %>
+ <%= javascript_include_tag 'application' %>
 
ActionView::Template::Error (web_app_theme.css isn't precompiled):
config/environments/production.rb
config.assets.compile = true

Missing css file
<%= stylesheet_link_tag 'web-app-theme', 'web-app-theme/base', 'web-app-theme/themes/default/style'%>
<%= stylesheet_link_tag 'application' %>
 
http://nokogiri.org/tutorials/installing_nokogiri.html
$sudo apt-get install libxslt-dev libxml2-dev
$sudo gem install nokogiri