criteria: added tests for left and right joins
criteria: added tests for left and right joins

Zaszczyk/cphalcon,unisys12/phalcon-hhvm,unisys12/phalcon-hhvm,Zaszczyk/cphalcon,Zaszczyk/cphalcon,unisys12/phalcon-hhvm,unisys12/phalcon-hhvm,unisys12/phalcon-hhvm,unisys12/phalcon-hhvm,Zaszczyk/cphalcon