Refactor Zend\Stdlib\ArrayTools to ArrayUtils, add missing headers.
Refactor Zend\Stdlib\ArrayTools to ArrayUtils, add missing headers.

- ArrayTools will now be called ArrayUtils after an anonymous vote (http://framework.zend.com/wiki/display/ZFDEV2/POLL+-+Array+class+name).
- Add missing Zend Framework headers to ArrayUtils class file and tests.

MadCat34/zend-paginator,MadCat34/zend-paginator,Maks3w/zend-paginator,Maks3w/zend-paginator,zendframework/zend-paginator,zendframework/zend-paginator