Updated README
Updated README

Updated README to include installation steps for node.js and bower if
using a Mac and Homebrew.

pengjiang80/ui,nrvale0/ui,kaos/ui,pengjiang80/ui,lvuch/ui,kaos/ui,ubiquityhosting/rancher_ui,rancher/ui,westlywright/ui,lvuch/ui,pengjiang80/ui,kaos/ui,jjperezaguinaga/ui,jjperezaguinaga/ui,rancher/ui,lvuch/ui,ubiquityhosting/rancher_ui,rancher/ui,westlywright/ui,vincent99/ui,rancherio/ui,nrvale0/ui,nrvale0/ui,westlywright/ui,ubiquityhosting/rancher_ui,vincent99/ui,vincent99/ui,rancherio/ui,rancherio/ui,jjperezaguinaga/ui