Completed Timeline i18n (localized text)

Hi,

I have finished the Timeline internationalization completely as promised. All text incl. actions are i18n aware now. I have separated translations to an extra file **timeline-locales.js** This file should be included on page before **timeline.js** if i18n text are needed. This allow to keeps the core file small and don't blow up with a lot of i18n text. At the moment there are translations in English, Catalan, German, Danish (partial), Russian, Spanish. Everybody how needs more translations should add them to this file!

I have also created a demo HTML file. Please take a look into **test_timeline_i18n.html** in test folder. It works like a charm.

Thanks in advance!