ejholmes/vagrant-heroku — pull request #25 by swrobel (2013-05-16 17:58:42+00:00)
Title: Don't download guest additions, Vagrant does that for us

It seems that Vagrant 1.2 (haven't tried any previous versions) downloads guest additions automatically ... or maybe it's Veewee. Either way, they get put in the iso/ folder and appear in /home/vagrant so we can just use them from there instead of downloading them yet again to /tmp. Trying to speed up the full build however I can here.