Cache i18n

Issue Summary

Thanks kbahey, your modules are amazing.

I saw that sitemenu cache the page but if you have i18n installed dont work because always call cache table and cache table didnt save language.

So If you switch language site menu still be in first cache language.

I am learning about cache at this moment. I think in your module need just insert . i18n_get_lang() in some place to be fine.

But you are the master, you know better than I.

Thanks for all again, and congratulations