Small improvements to init.php

[serjik]

Hi:

Can you add 'theme_dir' => _THEME_DIR_ variable to init.php in future releases please?

So it can be possible to use it for direct theme dir linking like: {$theme_dir}images/logo.gif

There are now:
'img_dir' => _THEME_IMG_DIR_,
'css_dir' => _THEME_CSS_DIR_,
'js_dir' => _THEME_JS_DIR_,
'tpl_dir' => _PS_THEME_DIR_,

But if I want to create my own dir within theme dir it will be hard to link to it.

Thanks a lot.