README.md in usable-0.1.0 vs README.md in usable-0.2.0

@@ -1,29 +1,60 @@
 # Usable
 
 Rack style mixins for Ruby objects. Mount your modules like you mean it!
 
 ```ruby
+module VersionKit
+  def save_version
+    "Saving up to #{self.class.config.max_versions} versions to #{self.class.config.table_name}"
+  end
+
+  def destroy_version
+    "Deleting versions from #{self.class.config.table_name}"
+  end
+end
+  
 class Model
   extend Usable
-  
-  module Versionable
-    def versions
-      "Saving #{self.class.config.max_versions} versions to #{self.class.config.table_name}"
-    end
+
+  usable VersionKit, only: :save_version do |config|
+    config.max_versions = 10
+    config.table_name = 'custom_versions'
   end
+end
 
-  # with options hash
-  use Versionable, table_name: 'custom_versions'
+>> Model.config.table_name
+=> "custom_versions"
+>> Model.new.versions      
+=> "Saving up to 10 versions to custom_versions"
+>> Model.new.destroy_version     
+=> nil
+```
+You can also define a custom module within the "usable" module that defines the methods which can be configured to be
+extended or excluded. The module must be named "Spec" and be defined one level inside the namespace. For example:
 
-  # or with block
-  use Versionable do |config|
-    config.max_versions = 10
+```ruby
+module VersionKit
+  module Spec
+    def version
+      "spec version included"
+    end
   end
+  
+  def version
+    "this version not included"
+  end
+  
+  def self.included(base)
+    puts base.usable_config.available_methods[:version].bind(self).call
+  end
 end
 
-Model.config.table_name #=> 'custom_versions'
-Model.new.versions #=> "Saving 10 versions to custom_versions"
+>> Example = Class.new.extend Usable
+=> Example
+>> Example.usable VersionKit
+spec version included
+=> Example
 ```
 
 ## Installation
 
 Add this line to your application's Gemfile: