i18n: Add untested windows support

According to [1] and [2] this commit should have a change to get i18n
working on windows.

[1] http://www.vultaire.net/blog/2010/12/23/i18n-with-gettext-and-python-on-windows-7/
[2] http://stackoverflow.com/questions/3678174/python-gettext-doesnt-load-translations-on-windows