GUI-561: Disable Google Fonts API call in Foundation

Although we've moved to local font references for the Lato and Oswald fonts, there was a lingering call to the Google Fonts API in the Foundation CSS.  See http://foundation.zurb.com/forum/posts/268-where-does-google-font-import-come-from

Fixes https://eucalyptus.atlassian.net/browse/GUI-561