Fix HTML-Proofer on Travis (#293)

* Remove a blog that's no longer about Sass

* Add problem URLs to the HTML-Proofer whitelist

Rakefile

@@ -14,6 +14,9 @@ task :test => ["sass:dart:version", "sass:libsass:version", "sass:ruby:version",
       "https://dnomak.com/flexiblegs/",
       "https://incident57.com/codekit/",
       "https://daringfireball.net/projects/markdown/",
+      "http://cognition.happycog.com/article/preprocess-this",
+      "http://benfrain.com/lightning-fast-sass-compiling-with-libsass-node-sass-and-grunt-sass/",
+      "http://www.lynda.com/CSS-tutorials/CSS-LESS-SASS/107921-2.html",
     ],
     file_ignore: [%r{^\./build/documentation}],
     assume_extension: true

data/community.yml

@@ -25,8 +25,6 @@ blogs:
     url: "http://thesassway.com/"
   - name: "CSS-Tricks"
     url: "http://css-tricks.com/search-results/?q=sass"
-  - name: "Ben Frain"
-    url: "http://benfrain.com/tag/sass/"
   - name: "NetTuts"
     url: "http://net.tutsplus.com/?s=sass"
   - name: "Unmatched Style"