use autoload instead of preloading classes
move global functions and constants into Ethna.php
move global functions and constants into Ethna.php
move global functions and constants into Ethna.php
move global functions and constants into Ethna.php
move global functions and constants into Ethna.php
move global functions and constants into Ethna.php
move global functions and constants into Ethna.php
improve tutorial to use the embedded Smarty package file