build to include woff2 fonts from bootstrap-sass

gulp/build.js

diff --git a/gulp/build.js b/gulp/build.js
index 5c5c957..8dcf45f 100644
--- a/gulp/build.js
+++ b/gulp/build.js
@@ -145,7 +145,7 @@
 
 gulp.task('fonts', function () {
   return gulp.src($.mainBowerFiles())
-    .pipe($.filter('**/*.{eot,svg,ttf,woff}'))
+    .pipe($.filter('**/*.{eot,svg,ttf,woff,woff2}'))
     .pipe($.flatten())
     .pipe(gulp.dest('dist/fonts/'));
 });