Merge pull request #321 from twbs/line-endings

Enforce Unix line endings.

.gitattributes

@@ -0,0 +1,8 @@
+# Enforce Unix newlines
+*.css   text eol=lf
+*.html  text eol=lf
+*.js    text eol=lf
+*.json  text eol=lf
+*.md    text eol=lf
+*.scss  text eol=lf
+*.yml   text eol=lf