Increased concurrent build from 3 to 5.
Setup build tools for extensions igbinary, msgpack, memcache and memcached.  Also includes building custom libmemcached library.
Upgraded to PHP 5.4.27.
Setup build tools for extensions igbinary, msgpack, memcache and memcached.  Also includes building custom libmemcached library.
Upgraded to PHP 5.5.11.