CB-7102 - Initial implementation of globalization plugin in Firefox OS

Partial. No currency and number functions
Moving GlobalizationProxy module to the top throws for me
"Exception calling native with command :: Globalization :: getLocaleName ::exception=TypeError: navigator.mozL10n is undefined" 

I see I was working on an app created with an older version of Cordova - on new one it indeed is not working - all dates are English - please set language to a different language before testing. `navigator.mozL10n.language.code = 'pt-BR'`