Installs Redis and MongoDB Modules 

Hi Semmy,

I have added a package.json file with MongoDB and Redis as dependencies and have added an inline shell script to the Vagrantfile which will run npm install when booting the vm.

I have also added an if statement to check for the package.json file.  If it is missing the install will be skipped and a message will be written to the console.  I have tested with and without the file to verify that it is working without errors in both cases.

Thanks!
Danielle