Add steps to install js requirements
Add steps to install js requirements

JS requirements are a pain, so I've added the steps required to install them.

This may help people wanting to try it out before packages are available.
gm-ah/Cachet,brianjking/openshift-cachet,sapk/Cachet,SamuelMoraesF/Cachet,rogerapras/Cachet,withings-sas/Cachet,leegeng/Cachet,0x73/Cachet,g-forks/Cachet,anujaprasad/Hihat,MatheusRV/Cachet-Sandstorm,ephillipe/Cachet,brianjking/openshift-cachet,pellaeon/Cachet,eduardocruz/Cachet,karaktaka/Cachet,murendie/Cachet,karaktaka/Cachet,SamuelMoraesF/Cachet,robglas/Cachet,billmn/Cachet,ephillipe/Cachet,ematthews/Cachet,MatheusRV/Cachet-Sandstorm,nxtreaming/Cachet,h3zjp/Cachet,coupej/Cachet,n0mer/Cachet,MicroWorldwide/Cachet,cachethq/Cachet,SamuelMoraesF/Cachet,NossaJureg/Cachet,sapk/Cachet,MicroWorldwide/Cachet,wngravette/Cachet,displayn/Cachet,rogerapras/Cachet,Mebus/Cachet,Mebus/Cachet,0x73/Cachet,leegeng/Cachet,g-forks/Cachet,sapk/Cachet,karaktaka/Cachet,withings-sas/Cachet,rogerapras/Cachet,ephillipe/Cachet,MatheusRV/Cachet-Sandstorm,gm-ah/Cachet,bthiago/Cachet,wngravette/Cachet,everpay/Cachet,coupej/Cachet,chaseconey/Cachet,Mebus/Cachet,anujaprasad/Hihat,elektropay/Cachet,murendie/Cachet,CloudA/Cachet,wakermahmud/Cachet,whealmedia/Cachet,chaseconey/Cachet,billmn/Cachet,bthiago/Cachet,Surventrix/Cachet,cachethq/Cachet,everpay/Cachet,CloudA/Cachet,n0mer/Cachet,ZengineChris/Cachet,billmn/Cachet,robglas/Cachet,ZengineChris/Cachet,murendie/Cachet,MatheusRV/Cachet-Sandstorm,alobintechnologies/Cachet,pellaeon/Cachet,brianjking/openshift-cachet,coupej/Cachet,n0mer/Cachet,elektropay/Cachet,bthiago/Cachet,ematthews/Cachet,h3zjp/Cachet,whealmedia/Cachet,wakermahmud/Cachet,coreation/Cachet,displayn/Cachet,anujaprasad/Hihat,g-forks/Cachet,Surventrix/Cachet,katzien/Cachet,withings-sas/Cachet,h3zjp/Cachet,eduardocruz/Cachet,clbn/Cachet,ZengineChris/Cachet,ematthews/Cachet,alobintechnologies/Cachet,NossaJureg/Cachet,NossaJureg/Cachet,MatheusRV/Cachet-Sandstorm,pellaeon/Cachet,katzien/Cachet,eduardocruz/Cachet,chaseconey/Cachet,coreation/Cachet,nxtreaming/Cachet,elektropay/Cachet,clbn/Cachet,wakermahmud/Cachet