title: Middleman bower and Susy
body: <p>I'm using middleman 3.3.3 with bower to install some js/css packages.
  I can make my scss works but middleman can't find where susy framework is. (is inside bower_components).
  I'm also using middleman-sprockets.</p>
  
  <p>So my config.rb is like that:</p>
  
  <pre><code>activate :sprockets
  
  ###
  # Page options, layouts, aliases and proxies
  ###
  
  # Per-page layout changes:
  #
  # With no layout
  # page "/path/to/file.html", layout: false
  #
  # With alternative layout
  # page "/path/to/file.html", layout: :otherlayout
  #
  # A path which all have the same layout
  # with_layout :admin do
  #   page "/admin/*"
  # end
  
  # Proxy pages (http://middlemanapp.com/basics/dynamic-pages/)
  # proxy "/this-page-has-no-template.html", "/template-file.html", locals: {
  #  which_fake_page: "Rendering a fake page with a local variable" }
  
  ###
  # Helpers
  ###
  
  # Automatic image dimensions on image_tag helper
  # activate :automatic_image_sizes
  
  # Reload the browser automatically whenever files change
  # activate :livereload
  
  # Methods defined in the helpers block are available in templates
  # helpers do
  #   def some_helper
  #     "Helping"
  #   end
  # end
  
  
  ready do
    sprockets.append_path File.join root, 'bower_components'
  end
  
  set :css_dir, 'stylesheets'
  
  set :js_dir, 'javascripts'
  
  set :images_dir, 'images'
  
  set :fonts_dir, 'fonts'
  
  
  # Build-specific configuration
  configure :build do
    # For example, change the Compass output style for deployment
    # activate :minify_css
  
    # Minify Javascript on build
    activate :minify_javascript
  
    # Enable cache buster
    # activate :asset_hash
  
    activate :gzip
  
    # Use relative URLs
    activate :relative_assets
  
    # Or use a different image path
    # set :http_prefix, "/Content/images/"
  end
  </code></pre>
  
  <p>My file tree is like:</p>
  
  <p>myproject
    - bower_components
      - susy
        - sass
        - lib
        - templates
        - bower.json
      - ...
    - config
    - scripts
    - source
      - stylesheets
         - all.css
         - _setting.scss
      - ...
    - bower.json
    - config.rb
    - ....</p>
  
  <p>all.css</p>
  
  <pre><code>/*
   * This file is the same as rails' application.scss
   */
  
  //= require "_settings"
  </code></pre>
  
  <p>_settings.scss</p>
  
  <pre><code>// Add all required scss files/folders
  @import "susy";
  </code></pre>
  
  <p>The error that i get tell me that it keep going to search "susy" in source/stylesheets.
  Any ints?</p>