Correcting readme file

It was refrencing the old plugin name for the npm install command
I added in some useful path logic 

I know it doesn't have a test yet, but I'm still a new to node. Since I needed to have it do this anyways I thought I might as well share. This simply appends enviroment variables that are probably already on peoples machines so that they are included when this script is run. This makes it a more likely this won't require any configuration on a dev's (or build) machine to use.
Update README.md
Merge pull request #1 from JonathanTech/patch-1

Correcting readme file
Merge pull request #2 from JonathanTech/patch-2

I added in some useful path logic
Merge pull request #1 from JosephClay/master

Updating from base project