Adding configuration support and changing 'couchrest-type' key to 'model' along with config options

lib/couchrest/model/configuration.rb

@@ -0,0 +1,49 @@
+module CouchRest
+
+  # CouchRest Model Configuration support, stolen from Carrierwave by jnicklas
+  #    http://github.com/jnicklas/carrierwave/blob/master/lib/carrierwave/uploader/configuration.rb
+
+  module Model
+    module Configuration
+      extend ActiveSupport::Concern
+
+      included do
+        add_config :model_type_key
+        
+        configure do |config|
+          config.model_type_key = 'model'
+        end
+      end
+
+      module ClassMethods
+
+        def add_config(name)
+          class_eval <<-RUBY, __FILE__, __LINE__ + 1
+            def self.#{name}(value=nil)
+              @#{name} = value if value
+              return @#{name} if self.object_id == #{self.object_id} || defined?(@#{name})
+              name = superclass.#{name}
+              return nil if name.nil? && !instance_variable_defined?("@#{name}")
+              @#{name} = name && !name.is_a?(Module) && !name.is_a?(Symbol) && !name.is_a?(Numeric) && !name.is_a?(TrueClass) && !name.is_a?(FalseClass) ? name.dup : name
+            end
+
+            def self.#{name}=(value)
+              @#{name} = value
+            end
+
+            def #{name}
+              self.class.#{name}
+            end
+          RUBY
+        end
+
+        def configure
+          yield self
+        end
+      end
+
+    end
+  end
+end
+
+