* vagrant dev - force hass-AIOHTTP to not use sendfile
Ref: https://www.virtualbox.org/ticket/9069
strongly needed for `home-assistant-polymer`
* vagrant dev - python 3.4 to 3.5 by upgrade to debian-stretch
- Bugfix: with f63a79ee we removed `script/home-assistant@.service`
systemd unit file, which is used by Vagrant box to start/stop hass
- simplify interaction with Vagrant, provision.sh now is the only
entry point and doesn't need the user to touch/remove files in
order to change provisioner behavior
Tabakhase
Alexander Fortin
irvingwa