Rename Tombfix.Service.extractors to Extractors

* Leave Tombfix.Service.extractors Object for Tombloo Patches
* Update api_test_patch.js
* Stop using with statement for Tombfix.Service.extractors #19

Close #14
Remove unnecessary if statement about Models

By resolving #16, this code is no longer needed.

via https://github.com/tombfix/core/commit/81b49feada267e8647a558965497d4c3e63cd3df#commitcomment-3564092

Thanks, YungSang!