add install instructions
update coverage badge
Merge pull request #116 from austinpray/readmeInstructions

add install instructions
Added Vagrant Config

Now you can use `vagrant up` to fire up a virtual machine with
 - whatever node version is specified in the package.json
 - a redis server
 - an instance of pro-grid running
cleaned up Vagrantfile comments
Merge branch 'master' of github.com:pro-grid/pro-grid into vagrant
added makefile commands
fixed nodemon refresh
added dev docs
rearrage tests
format Makefile
added link to dev instructions to README
Merge pull request #119 from austinpray/vagrant

Added Vagrant Config
full -> for README