Removed passing options to Rails find

`find` is simplified in Rails 4.1, so passing the options breaks it.

http://api.rubyonrails.org/classes/ActiveRecord/FinderMethods.html#method-i-find
http://apidock.com/rails/v3.2.13/ActiveRecord/FinderMethods/find
Merge pull request #20 from arikrak/patch-1

Removed passing options to Rails find