Moved attribution to a seperate file to avoid cluttering the code.

CONTRIBUTORS

@@ -0,0 +1,3 @@
+API limits code
+
+* Contributed by Chris Scott, https://github.com/christocracy/shopify-api-limits

lib/shopify_api/limits.rb

@@ -1,4 +1,3 @@
-# based on code from https://github.com/christocracy/shopify-api-limits
 module ShopifyAPI
   module Limits
     def self.included(klass)