Rename to clarify confusion about anti-pattern title

Closes #53

Author: vasanthk

README.md

@@ -42,8 +42,8 @@ A compilation of React Patterns, techniques, tips and tricks.
 - Anti-Patterns
   - [Introduction](./anti-patterns/README.md)
   - [Props In Initial State](./anti-patterns/01.props-in-initial-state.md)
-  - [Refs over findDOMNode()](./anti-patterns/02.refs-over-findDOMNode.md)
-  - [HOC over Mixins](./anti-patterns/03.HOC-over-mixins.md)
+  - [findDOMNode()](./anti-patterns/02.findDOMNode.md)
+  - [Mixins](./anti-patterns/03.HOC-over-mixins.md)
   - [setState() in componentWillMount()](./anti-patterns/04.setState-in-componentWillMount.md)
   - [Mutating State](./anti-patterns/05.mutating-state.md)
   - [Using Indexes as Key](./anti-patterns/06.using-indexes-as-key.md)

SUMMARY.md

@@ -39,8 +39,8 @@
 - Anti-Patterns
   - [Introduction](./anti-patterns/README.md)
   - [Props In Initial State](./anti-patterns/01.props-in-initial-state.md)
-  - [Refs over findDOMNode()](./anti-patterns/02.refs-over-findDOMNode.md)
-  - [HOC over Mixins](./anti-patterns/03.HOC-over-mixins.md)
+  - [findDOMNode()](./anti-patterns/02.findDOMNode.md)
+  - [Mixins](./anti-patterns/03.HOC-over-mixins.md)
   - [setState() in componentWillMount()](./anti-patterns/04.setState-in-componentWillMount.md)
   - [Mutating State](./anti-patterns/05.mutating-state.md)
   - [Using Indexs as Key](./anti-patterns/06.using-indexes-as-key.md)