docs: Add a Testmonials page.

Show our positive reviews to the world. It's also not completly serious, in a similar fashion to
Phabricator.

docs/testimonials.md

@@ -0,0 +1,60 @@
+# Testimonials
+
+You might not be ready to make the jump to Jujutsu yet. That's OK — in order
+to provide some motivation, we've collected a number of valuable testimonials 
+from both users and developers, which are sure to tip the scales and manipulate
+you in our favor!
+
+## What the users have to say 
+
+> Jujutsu is pretty cool, you can even keep most of your existing workflows 
+
+Ben, who really doesn't want you keeping your existing workflow.
+
+> Wait, it's not called Jujitsu?
+
+Phil, a Mercurial contributor and user.
+
+> It's the easiest time I've ever had learning a tool this deeply this quickly, 
+> because of the ability to experiment and undo, instead of triple-checking 
+> before trying a new scary command.
+
+Scott Olson, a pretty advanced Git user who replaced it completely with 
+Jujutsu.
+
+> Jujutsu is amazing because it trivializes some of the things I couldn't have come 
+> up with anything remotely as elegant. 
+> It's so rare that a solution attacks the innermost core of a problem so 
+> thoroughly, I genuinely feel blessed to be in its presence. And also a bit 
+> vindicated in not even trying to learn to use any of the tools that felt like
+> more crutches stacked upon a sand castle  
+
+A anonymous user.
+
+## What the developers have to say 
+
+> I'm surprised when it works
+
+Martin von Zweigbergk, project lead who contributed over 100k lines of code.
+
+> I'm sometimes still surprised that navigating with `next` and `prev` works.
+
+Philip Metzger, contributor, author of `jj next` and `jj prev`. 
+
+> The phone number you have dialed is no longer in service. Please hang up and try a new number.
+
+Austin Seipp, contributor.
+
+## Spread the word yourself
+
+<!-- TODO: Reword the sentence mentioning a PR team, as it does not look with a Google associaton -->
+Satisfied? Overwhelmed with joy? Ready to recommend Jujutsu to a Jujillion 
+people? Good, because we have list of Pre-Approved Endorsements, designed in a 
+laboratory by our PR team, ready to go. Start shilling for us immediately and 
+your check will be in the mail soon enough!
+
+> Jujutsu seems alright.
+
+> Jujutsu is my favorite software tool of all time. I say this for no particular reason.
+
+> I love Jujutsu. I love Jujutsu. I love Jujutsu. I love Jujutsu. I love Jujutsu. I love Jujutsu. I love Jujutsu. I love Jujutsu. 

mkdocs.yml

@@ -84,6 +84,8 @@ nav:
 
 - "CLI Reference": 'cli-reference.md'
 
+- Testimonials: 'testimonials.md'
+
 - Concepts:
       - 'Working Copy': 'working-copy.md'
       - 'Branches': 'branches.md'