"Un"-ignore build role
Switch vagrant box to hashicorp/precise64

precise64_base seems to have been deprecated
Update templating syntax for ansible 1.6
Document required ansible and vagrant versions
Remove tasks for installing sendmail with aptitude

Doesn't work when running in ansible because installation requires
answering prompts, which I don't think can be answered within
an ansible playbook (?)
Merge branch 'master' into nginx
Add nginx group to inventory and run nginx role on it