added the redis extension. close https://github.com/liip/php-osx/issues/57
added apcu support (disabled by default)
Merge branch '5_3_mountainlion' into 5_4_mountainlion

* 5_3_mountainlion:
  added apcu support (disabled by default)
  added the redis extension. close https://github.com/liip/php-osx/issues/57

Conflicts:
	build-php.pl
Merge branch '5_4_mountainlion' into 5_5_mountainlion

* 5_4_mountainlion:
  added apcu support (disabled by default)
  added the redis extension. close https://github.com/liip/php-osx/issues/57
enable APCu by default in 5.5.0