Merged CMS_BLOG_CONFIG with CMS_BLOG_API.
In CMS_BLOG_API, prefer argument of type CMS_USER, rather than using directly user id.
Added a CMS_EDITOR_CONTENT_FORMAT for now, to be the format editable by the WYSIWYG editor.
Added CMS_MODULE.is_initialized: BOOLEAN to equip router, and module_api with expected preconditions.
Fixed typo, especially in log output.
Corrected a few routine names such as add_authors that should not be a function according to its name.
Converted various function returning html content, to procedure appending html content to an output string to minimize temporary string object creation.
Cosmetic: added spaces to make code easier to read, and indentation.
#7 and #8: The class CMS_EDITOR generates javascript code that replaces a textarea with a wysiwyg editor. Only a few methods have to be implemented by the subclasses, for example by CMD_EDITOR_CKEDITOR. The class CMS_FORM_TEXTAREA extends WSF_FORM_TEXTAREA with features to include the javascript from CMS_EDITOR. The most complex usage is shown in CMS_NODE_TYPE_WEBFORM_MANAGER, where the textarea is only replaced if "full_html" is selected as the desired body format. This works dynamically on the browser side as soon as the user selects another format.
