[fix bug 900032] Upgrade base templates to Foundation 4

This PR includes updated templates for:

* remo/base/templates/404.html
* remo/base/templates/500.html
* remo/base/templates/about.html
* remo/base/templates/faq.html
* remo/base/templates/form-error.html
* remo/base/templates/labs.html
* remo/base/templates/main.html
* remo/base/templates/settings.html