Initial Translation Support

I have added the files that are necessary to start to translate the site
and the relative option to select the language inside the site
administration panel (options: automatic or available lang file).
At this moment only the index page (login, new user..) is fully
translated to demostrate how it works, so check it out.
I will continue the work when I have free time.

Translation Class File: php/translator
Translation Languages Files( ISO Language Codes for the filename ):
php/translator/lang