Prebuilt Packages on Ubuntu 13.04

NB: 13.04 is not officially supported. Please use either 12.04 or 13.10 if you run into problems.

To install prebuilt packages for Ubuntu 13.04 (amd64):

echo deb http://dl.hhvm.com/ubuntu raring main | sudo tee /etc/apt/sources.list.d/hhvm.list
sudo apt-get update
sudo apt-get install hhvm