twiggi web-based groupware Code

Database and template class are now abstract.
A new class adodb was introduced that extends the database class.
A new class smarty_tpl was introduced that extends the template class.
Added new options to the config file that are used to the decide which database and template classes to use.
Added start of default template style with test page hello_world.tpl

Function get_root in core class now returns the absolute path.
Added function load_file to core class to load new files (classes) and keeps track of them.
Made a dummy function get_module in core class which is used until the module class is working.
Added function get_debug_mode to core class which return of debugging mode is on.

Main page (index.php) now executes a query (SQL files will be added later) and shows the result on the hello_world template page.

Removed Smarty tar archive.
Updated COPYRIGHT file:
- Added information about Smarty and ADOdb.
- Updated the Twiggi web-based groupware license information.

Added initial support for database connections (using adodb).
Added initial support for template engines (using smarty).
Added initial support for the configuration file.
Added initial version of function core_print.

Updated readme.txt about the new directory layout.
Added the first steps of the core module and the index.php.

Removed branches, tags and trunk directory from the core module.
In the new layout they are no longer needed.

Moved to a new directory layout that can be used for testing.
Added COPYRIGHT file containing the copyright and license information.
Moved the core module to trunk.

Added readme.txt file to explain the layout of the twiggi 2 repository.
Added the layout of the first module, name core, which is the base module for twiggi2.