Spreewald 0.8.0 brings a file attachment step

# Attach a file
#
# Example:
#
#   Company.new.logo = File.new…
#
#   Given the file "…" was attached as logo to the company above
#
#
# Example:
#
#   class Gallery
#     has_many :images, :as => :owner
#   end
#
#   class Image
#     belongs_to :owner, polymorphic: true
#   end
#
#   # so container = Image.new; container.file = File.new… , container.owner = object
#
#   Given the file "…" was attached as Image/file to the company above
#
#
# Example:
#
#   Set updated_at with
#
#     Given … above at "2011-11-11 11:11"
#