adds missing skip to content link in the localization flow (#29)
* Adds i18n support for theme
* Adds a way for sites to have custom css.
This change adds a param to the theme (called customCss), which allows sites to
provide extra css under static/, so that they don't need to copy the theme's css
whole file.
If no custom css is in the params, this change is NOP.
* Adds skip to content link as part of the localization flow
lucasradaelli