README.md in machinist-mongoid-0.0.1 vs README.md in machinist-mongoid-0.1.0

@@ -1,10 +1,9 @@
 # Machinist::Mongoid
 
-This library is intended to support machinist 2.0 factories within Mongoid 3.x 
-codebases.  It's inspired by the existing [machinist_mongo][mm] gem that doesn't 
-support mongoid 3.x.
+This library is intended to support machinist 2.0 factories within Mongoid 3.x
+and 4.x versions.  It's originally inspired by the existing [machinist_mongo][mm] gem.
 
 ## Installation
 
 Add this line to your application's Gemfile:
 
@@ -16,12 +15,19 @@
 
 Or install it yourself as:
 
     $ gem install machinist-mongoid
 
-## Usage
+## Testing
 
-TODO: Write usage instructions here
+    # once
+    bundle install
+    appraisal install
+
+    # each test run.
+    appraisal mongoid-3x rake spec
+    appraisal mongoid-4x rake spec
+
 
 ## Contributing
 
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)
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