node version and setup

[ntindicator]

When the setup commands are run, and the correct node version is not installed the nvm use command didn't work.

To fix it I ran nvm install lts/erbium. I found it a bit confusing to get started until I worked that this was missing.

Setup commands:

git clone https://github.com/leemunroe/grunt-email-workflow.git
cd grunt-email-workflow
nvm use
npm install

[Lee Munroe]

Good point, this is not required. Removing this line from readme