Moved generation stage stylesheets into "detail" folder
* they are read by FunctionReadFile to and passed to FunctionGenerate as a DOM tree to execute them as if they where located in the parent directory
** this is required so they behave as expected without requiring all paths to be absolute
* this change was implemented to make it clear that "make.xsl" is the main generation stylesheet
** additionally this further separates the framework implementation from the site-specific stylesheets and contents