add giallo zafferano support

[nico202]

Giallo zafferano is the most famous italian cooking website.
Example link: https://ricette.giallozafferano.it/Zuppa-di-cipolle-gratinata.html

I'm new (just discovered) to org-chef, if I get used to it I might try to add support for the website myself

[nico202]

WIP: https://gist.github.com/nico202/edf2aaad2193289d94981f1640bbe2b6

I'm having problems with ingredients, the other part should be working, if you can have a look at it, it would be wonderful

   ((org-chef-match-url "giallozafferano.it" URL) (org-chef-giallozafferano-fetch URL))

Thanks, Nicolò

[Chobbes]

Hi there, just a heads up for all of you org-chef users (and this seems like a good place to mention it), but I have suddenly become quite a lot more busy (which is great, but makes looking at stuff like this a little lower priority :( ).

If you can get this working and can make a pull request I'm very happy to merge it, though! Getting emacs to scrape a website can be a little fiddly.

[egh]

With the merger of #50 this now works.