Refactored CMS_MODULE.router (..): WSF_ROUTER design,
to create only one router object of type CMS_ROUTER.
Added optional CMS_NODE.link: CMS_LOCAL_LINK
Reviewed permissions related to node module.
Refactor and add CMS_STORAGE_SQL(_BUILDER) abstractions
for implementation relying only on SQL statements.
Factorized sql builder initialization (to work for sqlite and mysql storage builders).
Added CMS_RESPONSE.formatted_string (a_text: READABLE_STRING_GENERAL; args: TUPLE): STRING_32
Added function "translation", but not implemented for now.
Updated indexing notes and comments.
Code cleaning.
Added CMS_NODE_TYPE as descendant of CMS_CONTENT_TYPE,
in case we have content which is not a node in the future.
(probably useless, but for now, this extra abstraction is harmful)
Moved all node related code under node module cluster.
Applied comments from Javier Velilla.
Code cleaning.
but this is an example about on to add a new content type, and support it.
Fixed new node form workflow.
The current state is not final, it requires many changes, but for now, it implements a node editing workflow.
