Allineamento upstream/master

Create 2018-03-29-response-to-an-empirical-analysis-of-traceability.md

Updated with recommendations from surae and grammar/spelling changes

Please wait until at least 12pm EST 2018-03-29 to merge.

Typo in developer-guides.md

Small typo to correct.

Error in hangout.md files (wrong link to StackExchange)

Add merchant nature provides

Blogpost for the scheduled network upgrade that is planned for April 6

Added Qubes-Whonix User Guide to Italian so the site will build correctly

Add merchant City Map Decor

Add merchant "bitsler"

Replaced tacotime with binaryFate on the team page

Fix link to hiding tcp miner trafic incorectly set to the crypto primitives & concepts

Added link to original btctalk thread

Add merchants to list

Add merchant Hiri to list

Alphabetize user guides page.

Add interactive developer to merchants.yml

Translation from English to Spanish downloads.md

Translation from English to spanish faq.md 1040 w

Initial Italian Localization

Put user guide entries and categories into alphabetic order.
Mention alphabetic order in README in two spots.
Nit: remove empty space from README at the end of line 176.

This is my second contribution. I hope you like it