SASS Deprecation warning

[stuliston]

From the Heroku logs

2013-06-28T04:16:35.792102+00:00 app[web.1]: I, [2013-06-28T04:15:53.626997 #2]  INFO -- : Started GET "/bounties" for 150.101.167.22 at 2013-06-28 04:15:53 +0000
2013-06-28T04:16:35.792490+00:00 app[web.1]:          from line 3 of /app/app/assets/stylesheets/common/forms.css.sass
2013-06-28T04:16:35.792490+00:00 app[web.1]:          from line 3 of /app/app/assets/stylesheets/bounties.css.sass
2013-06-28T04:16:35.792490+00:00 app[web.1]:
2013-06-28T04:16:35.792490+00:00 app[web.1]:
2013-06-28T04:16:35.792490+00:00 app[web.1]:          from line 3 of /app/app/assets/stylesheets/bounties.css.sass
2013-06-28T04:16:35.792490+00:00 app[web.1]: W, [2013-06-28T04:15:58.772147 #2]  WARN -- : WARNING: box-shadow is deprecated and will be removed in the next major version release
2013-06-28T04:16:35.792490+00:00 app[web.1]:          from line 23 of /app/app/assets/stylesheets/meta/helpers.css.sass, in `input-focus'
2013-06-28T04:16:35.792490+00:00 app[web.1]:          on line 7 of /app/vendor/bundle/ruby/2.0.0/gems/bourbon-3.1.6/app/assets/stylesheets/_bourbon-deprecated-upcoming.scss, in `box-shadow'
2013-06-28T04:16:35.792739+00:00 app[web.1]: W, [2013-06-28T04:15:58.990592 #2]  WARN -- : WARNING: box-shadow is deprecated and will be removed in the next major version release
2013-06-28T04:16:35.792739+00:00 app[web.1]:
2013-06-28T04:16:35.792739+00:00 app[web.1]:          on line 7 of /app/vendor/bundle/ruby/2.0.0/gems/bourbon-3.1.6/app/assets/stylesheets/_bourbon-deprecated-upcoming.scss, in `box-shadow'
2013-06-28T04:16:35.792739+00:00 app[web.1]:          from line 5 of /app/app/assets/stylesheets/bounties.css.sass
2013-06-28T04:16:35.792739+00:00 app[web.1]:          from line 3 of /app/app/assets/stylesheets/bounties.css.sass
2013-06-28T04:16:35.792739+00:00 app[web.1]:          from line 3 of /app/app/assets/stylesheets/bounties.css.sass
2013-06-28T04:16:35.792739+00:00 app[web.1]:
2013-06-28T04:16:35.792490+00:00 app[web.1]:          from line 14 of /app/app/assets/stylesheets/common/forms.css.sass
2013-06-28T04:16:35.792490+00:00 app[web.1]:          from line 3 of /app/app/assets/stylesheets/bounties.css.sass
2013-06-28T04:16:35.792739+00:00 app[web.1]:
2013-06-28T04:16:35.793079+00:00 app[web.1]: I, [2013-06-28T04:15:59.555178 #2]  INFO -- :   Rendered bounties/_table.html.erb (26.5ms)
2013-06-28T04:16:35.792739+00:00 app[web.1]:          from line 101 of /app/app/assets/stylesheets/common/structure.css.sass