Support for PHP 5.3+ and HHVM
Support for PHP 5.3+ and HHVM

closes kohana/core#504
dreamsxin/kohana,gold3bear/kohana,driutheman/kohana,qianzy96/kohana,yeysman/kohana,exlant/kohana,anhnt0212/kohana,web-player/kohana,mattwadey/kohana,exlant/kohana,driutheman/kohana,JanvanCasteren/kohana,jellycheng/kohana,zhangjingpu/kohana,kohana/kohana,16nsk/kohana,ajose1024/kohana