Part selection page
* radmin/autocomplete_light_registry.py
  -- Unnecessary import
* remote_start/static/customer_styles.css
  remote_start/templates/select_parts.html
  -- Added in a neater way to display part categories.  It's not really
  a huge deal since it'll likely be replaced in the future.
* remote_start/urls.py
  -- Added the category URL
* remote_start/views.py
  -- Added in the logic for parsing the user's car out and fetching all
  parts that map to this.  This list is then passed into the page at
  /parts_list/CATEGORY, where it will be displayed for output.  Almost
  done.