Merge pull request #155 from conveyal/dev

v3.6.1

Author: trevorgerhardt

lib/css-transform.js

@@ -69,7 +69,7 @@ const base64ify = postcss.plugin('postcss-base64ify', function () {
         .split('?')[0]
         .split('#')[0]
       let file
-      if (filename.indexOf('data') === 0 || filename.length === 0) {
+      if (filename.indexOf('data') === 0 || filename.length === 0 || filename.indexOf('http') === 0) {
         return string
       } else if (filename[0] === '/') {
         file = path.join(process.cwd(), filename)