Take a riff off Asimov's first law of robotics (#284)

* Take a riff off Asimov's first law of robotics

This simply rewords some of Asimov's great thinking and applies
to the values of a project.

* Take another pass at rewording Asimov's value.

Author: Steven Dake

VALUES.md

@@ -3,6 +3,8 @@
 We want to make sure every member has a shared understanding of the goals and
 values we hold as a team:
 
+- Know your customer. Try to learn about what your customers care about, how they think about it. Design for them, not for you.
+
 - Optimize for the **overall project**, not your own area or feature
   - A shortcut for one individual can mean a lot of extra work or disruption for
     the rest of the team.