Changed CMS_HOOK_BLOCK.get_block_view to accept only attached string for `a_block_id'.
Keep simple name in CMS_MENU_SYSTEM.
Module that implements a CMS_HOOK need now to redefine CMS_MODULE.register_hooks .
Added simple code for NODE_MODULE, in order to see something.
Added CMS_URL_UTILITIES that should be used to compute url for cms path such as "/foo/bar".
Implemented get_active in CMS_RESPONSE to update the "is_active" on each link.
Added NOT_IMPLEMENTED_ERROR_CMS_RESPONSE.
Implemented a few hooks in DEMO module, for testing.
Updated smarty template related code.
Reversed the design, and break dependency CMS_SETUP => CMS_API .
Now CMS_API has attribute setup: CMS_SETUP .
Moved error_handler from CMS_SETUP to CMS_API.
The instance of CMS_SETUP is used when instanciating modules.
The instance of CMS_API is used when instanciating CMS_REPONSE and Handlers/Filters.
The instance of CMS_API is passed as argument to build the CMS_MODULE.router and filter.
