Revert "Remove duplicate initializer"

This reverts commit 44d0e6d.

Author: derrickreimer

lib/drip/resources/tag.rb

@@ -5,5 +5,10 @@ class Tag < Resource
     def self.resource_name
       "tag"
     end
+
+    def initialize(raw_data = {})
+      @raw_attributes = raw_data.dup.freeze
+      @attributes = @raw_attributes
+    end
   end
 end