Add Basic Vagrant box for dev.

[jarofgreen]

I don't know if you'd want this to clutter up your repository, it's just I was trying to work on the code on a Mac with PHP5 installed and I couldn't run the tests. So I did my usual and just threw up a vagrant box ....

Added aliases so it's just:

vagrant up
vagrant ssh
composer install 
test

[jarofgreen]

The Travis failure is PHP 5.3 problem that would be fixed by #25