astina/yy — pull request #15 by benib (2014-09-20 09:23:31+00:00)
Title: allow multiple breakpoints passed to respond-to mixin

This allows you to pass multiple breakpoints to respond-to like this:

```sass
+respond-to(a b)
```
and then wrapping the content in a combined media query (by comma separating the one for `a` and the one for `b`)