added the redis extension. close https://github.com/liip/php-osx/issues/57
Merge branch '5_3_mountainlion' into 5_4_mountainlion

* 5_3_mountainlion:
  added the redis extension. close https://github.com/liip/php-osx/issues/57
Merge branch '5_4_mountainlion' into 5_5_mountainlion

* 5_4_mountainlion:
  added the redis extension. close https://github.com/liip/php-osx/issues/57