Build: Update .csslintrc to match current css styleguide

Author: arschmitz

.csslintrc

@@ -1,11 +1,12 @@
 {
 	"adjoining-classes": false,
 	"box-model": false,
+	"box-sizing": false,
 	"compatible-vendor-prefixes": false,
 	"duplicate-background-images": false,
 	"import": false,
 	"important": false,
-	"text-indent": false,
 	"outline-none": false,
-	"overqualified-elements": false
+	"overqualified-elements": false,
+	"text-indent": false
 }