add qiniu_image_path

lib/paperclip-qiniu.rb

 require "paperclip-qiniu/version"
 require 'paperclip/storage/qiniu'
+require 'paperclip/qiniu/action_view_extensions/qiniu_image_path' if defined?(ActionView)

lib/paperclip/qiniu.rb

+require 'paperclip-qiniu'

lib/paperclip/qiniu/action_view_extensions/qiniu_image_path.rb

+module Paperclip
+  module Qiniu
+    module ActionViewExtensions
+      module QiniuImagePath
+        def qiniu_image_path(source, options={})
+          thumbnail = options.delete(:thumbnail)
+          res = source
+          res += "?imageMogr" if thumbnail
+          res += "/thumbnail/#{CGI.escape thumbnail}" if thumbnail
+          res.html_safe
+        end
+      end
+    end
+  end
+end
+
+ActionView::Base.send :include, Paperclip::Qiniu::ActionViewExtensions::QiniuImagePath