title: CodeIgniter - Using existing classes with CodeIgniter, any problems with including them directly?
body: <p>I am considering using CodeIgniter as the framework for my next web-application. However, I already have a large number of helper classes and data structures defined. I could add them to the application's library but I have to rename a large number of files and classes' name to match the <a href="http://codeigniter.com/user_guide/general/creating_libraries.html" rel="nofollow noreferrer">criterion</a></p>
  
  <p>Can I just directly include files as in working on a normal web application, bypassing load->library()? Or is the library reserved for commonly reused classes?</p>