Changed OS X instruction include only libevent.
Changed OS X instruction include only libevent.

It is recommended to use pip rather than Homebrew to manage Python dependencies.
agoragames/locust,normanb/locust,dmoliveira/locust,kyroskoh/locust,agoragames/locust,cloudant/locust,cgoldberg/locust,armersong/locust,kentzzhang/locust,cloudant/locust,liubq919/locust,jaume-pinyol/locust,RollForReflex/locust,harrisonfeng/locust,santiavenda2/locust,yangchaogit/locust,TZer0/locust,wndhydrnt/locust,Diogo-Costa/locust,locustio/locust,rackerlabs/locust,timaakulich/locust,noif/locust,donglei/locust,donglei/locust,ismail-s/locust,moongtaeng/locust,edx/locust,doctoryes/locust,armersong/locust,dmoliveira/locust,wndhydrnt/locust,fengshao0907/locust,locustio/locust,cgoldberg/locust,agoragames/locust,lixar/locust,donglei/locust,pmdarrow/locust,ismail-s/locust,mbeacom/locust,kentzzhang/locust,heyman/locust,fengshao0907/locust,bugsduggan/locust,edx/locust,Diogo-Costa/locust,normanb/locust,jacobgardner/locust,lixar/locust,rohitgup14/locust,scalp42/locust,cpennington/locust,pglass/locust,noif/locust,kentzzhang/locust,locustio/locust,cpennington/locust,cloudant/locust,cloudant/locust,nagyistoce/locust,cgoldberg/locust,locustio/locust,fordhurley/locust,fordhurley/locust,cpennington/locust,minhoryang/locust,pglass/locust,RollForReflex/locust,lixar/locust,wndhydrnt/locust,santiavenda2/locust,fengshao0907/locust,jaume-pinyol/locust,rackerlabs/locust,yangchaogit/locust,moongtaeng/locust,moongtaeng/locust,rohitgup14/locust,rohitgup14/locust,pmdarrow/locust,santiavenda2/locust,pan1cz/locust,doctoryes/locust,timaakulich/locust,leo23/locust,doctoryes/locust,RollForReflex/locust,fengshao0907/locust,minhoryang/locust,mbeacom/locust,liubq919/locust,scalp42/locust,dmoliveira/locust,pmdarrow/locust,edx/locust,nagyistoce/locust,Diogo-Costa/locust,bugsduggan/locust,mbeacom/locust,TZer0/locust,rohitgup14/locust,edx/locust,liubq919/locust,minhoryang/locust,RollForReflex/locust,Diogo-Costa/locust,mbeacom/locust,cpennington/locust,timaakulich/locust,fordhurley/locust,ismail-s/locust,pan1cz/locust,harrisonfeng/locust,noif/locust,kentzzhang/locust,rackerlabs/locust,pan1cz/locust,kyroskoh/locust,jacobgardner/locust,scalp42/locust,moongtaeng/locust,jacobgardner/locust,lixar/locust,TZer0/locust,donglei/locust,yangchaogit/locust,kyroskoh/locust,doctoryes/locust,bugsduggan/locust,jaume-pinyol/locust,pglass/locust,leo23/locust,wndhydrnt/locust,armersong/locust,leo23/locust,nagyistoce/locust,leo23/locust,dmoliveira/locust,noif/locust,harrisonfeng/locust,armersong/locust,yangchaogit/locust,normanb/locust