Remove broken CentOS url
Removing windows boxes; they're broken in latest vagrant/virtualbox combo
Remove precise64-squishy box

We no longer use this internally and the URL is broken.
Merge branch 'master' of https://github.com/preflightsiren/vagrantboxes-heroku

Conflicts:
	www/index.html
Merge branch 'master' of https://github.com/srodrig0209/vagrantboxes-heroku

Conflicts:
	www/index.html
Merge branch 'patch-2' of https://github.com/ezheidtmann/vagrantboxes-heroku

Conflicts:
	www/index.html