[added] docs for excluding tests to the README (resolves #60)

Author: Todd Kloots

CHANGELOG.md

@@ -1,7 +1,7 @@
 v0.2.3 - Wed, 10 Jun 2015 17:07:25 GMT
 --------------------------------------
 
-- 
+- [6f38fe8](../../commit/6f38fe8) [Added] Ability to exclude tests (resolves #57)
 
 
 v0.2.2 - Tue, 09 Jun 2015 18:06:39 GMT

README.md

@@ -65,3 +65,9 @@ desktop-specific rules by specifying a specific device type:
 ```
 a11y(React, { device: ['mobile'] });
 ```
+
+It's also possible exclude certain tests:
+
+```
+a11y(React, { exclude: ['REDUNDANT_ALT'] });
+```