Updated request spec as follows:
  Change create recipe and cookbook requests to use multipart/form-data.
   This allows for the POSTing of images along with the rest of the form
   data (though it makes things a little more complicated).
  Change search scripts to use rating and prep_time as minimum values, and
   add corresponding rating_max and prep_time_max options.

Update recipes/search script to support the following options:
  instructions
  prep_time
  prep_time_max
  rating_max
  description
  using
  using_only
  show_only
  sort_by

Update recipes/search script to perform a text search on appropriate text
fields (name, author_name, instructions, description) instead of taking
only exact matches.