Started introduction to the resources files.

manual/opencs/files_and_directories.tex

@@ -45,4 +45,5 @@ Project files extension is, to not surprise ``.project''. The whole name of the
 Project files are stored inside the user directory, in the \textbf{projects} subfolder. This is the path location for both freshly created project files, and a place where Open{CS} looks for already existing files.\\
 
 \paragraph{Resources files}
-%textures, sounds, whatever
+%textures, sounds, whatever
+Unless we are talking about the fully text based game, like Zork or Rogue, you are expecting that a video game is using some media files: models with textures, pictures acting as icons, sounds and everything else. Since content files, no matter if it is esp, esm or new Open{MW} file type do not contain any of those, it's clear that they have to be deliver with a different file. It is also clear that this, let's call it ``resources file``, have to be supported by the engine. Without code handling those files, it is nothing more than a mathematical abstraction -- something, that lacks meaning for human beings\footnote{Unless we call programmers a human beings.}. Therefore this section must cover ways to add resources files to your content file, and point out what is supported. We are going to do just that. Later, you will learn how to make use of those files in your content.