Studio: updating font face imports

* since Sass can now process @import rules
* to simplify the number of external calls
* maintains the http/https agnostic work
* removes unused Bree Serif font face

cms/static/sass/assets/_fonts.scss

 // studio - assets - fonts
-// NOTE: Sass currently can't process the standard Google Web Font import method, so a @font-face with src declaration of the .woff file that the Google @import method uses is needed :/
 // ====================
 
-// Open Sans - http://www.google.com/fonts/specimen/Open+Sans
-@font-face {
-  font-family: 'Open Sans';
-  font-style: normal;
-  font-weight: 700;
-  src: local('Open Sans Bold'), local('OpenSans-Bold'), url(http://themes.googleusercontent.com/static/fonts/opensans/v6/k3k702ZOKiLJc3WVjuplzKRDOzjiPcYnFooOUGCOsRk.woff) format('woff');
-}
-@font-face {
-  font-family: 'Open Sans';
-  font-style: normal;
-  font-weight: 300;
-  src: local('Open Sans Light'), local('OpenSans-Light'), url(http://themes.googleusercontent.com/static/fonts/opensans/v6/DXI1ORHCpsQm3Vp6mXoaTaRDOzjiPcYnFooOUGCOsRk.woff) format('woff');
-}
-@font-face {
-  font-family: 'Open Sans';
-  font-style: italic;
-  font-weight: 700;
-  src: local('Open Sans Bold Italic'), local('OpenSans-BoldItalic'), url(http://themes.googleusercontent.com/static/fonts/opensans/v6/PRmiXeptR36kaC0GEAetxhbnBKKEOwRKgsHDreGcocg.woff) format('woff');
-}
-@font-face {
-  font-family: 'Open Sans';
-  font-style: italic;
-  font-weight: 300;
-  src: local('Open Sans Light Italic'), local('OpenSansLight-Italic'), url(http://themes.googleusercontent.com/static/fonts/opensans/v6/PRmiXeptR36kaC0GEAetxvR_54zmj3SbGZQh3vCOwvY.woff) format('woff');
-}
-@font-face {
-  font-family: 'Open Sans';
-  font-style: italic;
-  font-weight: 400;
-  src: local('Open Sans Italic'), local('OpenSans-Italic'), url(http://themes.googleusercontent.com/static/fonts/opensans/v6/xjAJXh38I15wypJXxuGMBrrIa-7acMAeDBVuclsi6Gc.woff) format('woff');
-}
-@font-face {
-  font-family: 'Open Sans';
-  font-style: normal;
-  font-weight: 400;
-  src: local('Open Sans'), local('OpenSans'), url(http://themes.googleusercontent.com/static/fonts/opensans/v6/cJZKeOuBrn4kERxqtaUH3bO3LdcAZYWl9Si6vvxL-qU.woff) format('woff');
-}
-
-// Bree Serif - http://www.google.com/fonts/specimen/Bree+Serif
-@font-face {
-  font-family: 'Bree Serif';
-  font-style: normal;
-  font-weight: 400;
-  src: local('Bree Serif'), local('BreeSerif'), url(http://themes.googleusercontent.com/static/fonts/breeserif/v2/LQ7WLTaITDg4OSRuOZCps73hpw3pgy2gAi-Ip7WPMi0.woff) format('woff');
-}
+// import from google fonts - Open Sans (http://www.google.com/fonts/specimen/Open+Sans)
+@import url(//fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,400,300,600,700);