Update ubuntu install instructions

Author: th3james

installers/installUbuntu.sh

@@ -1,14 +1,17 @@
 # Add repositories
 echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list
 sudo apt-get install -y python-software-properties python g++ make
+sudo apt-get install software-properties-common
 sudo add-apt-repository -y ppa:chris-lea/node.js
 sudo apt-get update
 
 # Install dependencies
 sudo apt-get install mongodb-10gen
+
 sudo apt-get install nodejs
+sudo ln -s /usr/bin/nodejs /usr/bin/node
 
-npm install -g grunt-cli
+sudo npm install -g grunt-cli
 
 # Setup the application
 cd server/ && npm run-script setup