Make laravel-langman work with lang files in subdirectories:

lang
  |_ en
      |_something
         |_file.php
  |_ fr
      |_something
         |_file.php

The file parsing (https://github.com/themsaid/laravel-langman/compare/master...nicolasbeauvais:langman-subdirectories?expand=1#diff-e07e4dbec2b7af0db87b7c9a92ddee86R61) could be improved with the new Str::before and Str::after methods but it would require illuminate/support:5.5 so I did it in a less fashionable way.

I renamed the $fileName var to $filePath as it makes more sense now.

I only had to change two lines of code to make it work, you made some very steady code 👍