Update naming history explanation

Author: mjankowski

NAME.md

@@ -1,11 +1,18 @@
-# Why is this project called "Factory Girl"?
+# Project Naming History
 
-The name "Factory Girl" might be confusing to some developers who encounter this
-library.
+## Factory Girl
 
-[We chose the name](https://robots.thoughtbot.com/waiting-for-a-factory-girl) as
-a nod in the direction of the [Factory method](https://en.wikipedia.org/wiki/Factory_method_pattern)
+This library was [initially released](https://robots.thoughtbot.com/waiting-for-a-factory-girl)
+in 2008 with the name "Factory Girl".
+
+We chose the name as a nod in the direction of the [Factory method](https://en.wikipedia.org/wiki/Factory_method_pattern)
 and [Object Mother](http://martinfowler.com/bliki/ObjectMother.html) software
 patterns from the _Design Patterns_ book, and as a reference to the
 [Rolling Stones song](https://www.youtube.com/watch?v=4jKix2DFlnA) of the same
 name.
+
+## Factory Bot
+
+The name "Factory Girl" was confusing to some developers who encountered this
+library, and offensive or problematic to others. In October 2017 we [renamed the library](https://robots.thoughtbot.com/factory_bot)
+to "Factory Bot".

README.md

@@ -5,7 +5,7 @@ factory_bot is a fixtures replacement with a straightforward definition syntax,
 If you want to use factory_bot with Rails, see
 [factory_bot_rails](https://github.com/thoughtbot/factory_bot_rails).
 
-_[Interested in the project name?](NAME.md)._
+_[Interested in the history of the project name?](NAME.md)_
 
 Documentation
 -------------