Add newlines between chunks of css

Right now, the different chunks of css overlap which isn't what we are trying to do at this step (the idea is that you can minify at a later point in the build step).  This adds some newlines between chunks of found css so that they don't slowly pule up on top of each other.

Author: bcomnes

index.js

@@ -39,7 +39,7 @@ function cssExtract (bundle, opts) {
       var source = from2(chunk.source)
       var sm = staticModule({
         'insert-css': function (src) {
-          writeStream.write(String(src))
+          writeStream.write(String(src) + '\n\n')
           return from2('null')
         }
       })