title: Compass gem throwing error
body: <p>I'm trying to get started with Compass &amp; Sass. I've installed the compass gem with three versions of ruby (1.9.1, 1.9.2, 1.9.3) and each time I get the same error:</p>
  
  <pre><code>martin@crunchbang:~$ compass
  /home/martin/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.3/lib/bundler/shared_helpers.rb:22:in `default_gemfile': Could not locate Gemfile (Bundler::GemfileNotFound)
      from /home/martin/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.3/lib/bundler.rb:213:in `default_gemfile'
      from /home/martin/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.3/lib/bundler.rb:164:in `root'
      from /home/martin/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.3/lib/bundler.rb:123:in `load'
      from /home/martin/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.3/lib/bundler.rb:114:in `setup'
      from /home/martin/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.3/lib/bundler.rb:119:in `require'
      from /home/martin/.rvm/gems/ruby-1.9.3-p194/gems/compass-0.12.1/bin/compass:25:in `&lt;top (required)&gt;'
      from /home/martin/.rvm/gems/ruby-1.9.3-p194/bin/compass:19:in `load'
      from /home/martin/.rvm/gems/ruby-1.9.3-p194/bin/compass:19:in `&lt;main&gt;'
      from /home/martin/.rvm/gems/ruby-1.9.3-p194/bin/ruby_noexec_wrapper:14:in `eval'
      from /home/martin/.rvm/gems/ruby-1.9.3-p194/bin/ruby_noexec_wrapper:14:in `&lt;main&gt;'
  </code></pre>
  
  <p>How can I resolve this issue?</p>
  
  <p>Any help is much appreciated.</p>