Use trusty for travis in order to support HHVM in unit tests.
Use trusty for travis in order to support HHVM in unit tests.

SysBind/thebuggenie,milkyway-git/thebuggenie,azaghal/thebuggenie,nrensen/thebuggenie,thebuggenie/thebuggenie,azaghal/thebuggenie,azaghal/thebuggenie,milkyway-git/thebuggenie,thebuggenie/thebuggenie,milkyway-git/thebuggenie,thebuggenie/thebuggenie,thebuggenie/thebuggenie,nrensen/thebuggenie,nrensen/thebuggenie,azaghal/thebuggenie,milkyway-git/thebuggenie,thebuggenie/thebuggenie,SysBind/thebuggenie,nrensen/thebuggenie,SysBind/thebuggenie,SysBind/thebuggenie