Switches libmysqlclient/mysqlnd apache2/cgi build options to include mysqlnd.h in php5-dev

Some users need to build mysqlnd plugins

Closes #21
igbinary support through a dedicated package
PHP 5.4.11 - Squeeze

  * New upstream release
  * Sync with Debian
  * mysqlnd.h is now included in php5-dev
  * built-in igbinary support