#3 Modify design of i18n

[chololo]

Right now internationalization (i18n) depends on the
functionality provided by Struts.

One of the goals is to stop depending on struts for the
functionality of the library and try to build something
that works with an independent schema.

So what is needed is a first draft of an
internationalization module that is independent of
struts and that is flexible (it should allow to plugin
other internationalization modules).

This should rely heavily on spring.