Install VIPS in home directory
Improve documentation
Rename variables
Separate server bootstrapping from general setup

This way only bootstrapping requires the root password and setup will just
work with passwordless admin account.
Simplify setup using `with_items`
Update build script for VIPS

Ensure it’s idempotent using Ansible `creates` option.
Use admin user instead of root for deploy
Improve style
Define `app_env` as list
Use admin user instead of root for server setup
Map port 80 to 3000 using iptables and start app there

Does not require root to run start command.
Extract `imagemagick` role
Document how to undo port mapping
Simplify VIPS role using `with_items`
Improve naming
Improve documentation
Document `authbind` support

Lets you bind to ports < 1024 without root. Unfortunately, it doesn’t work
together with our Streamline.js CoffeeScript loader, so I opted for the iptables
rerouting.

/cc @aseemk @iangilman
Open up app port externally
Bump `deepzoomtools` to 0.0.3

Ensures support with VIPS and ImageMagick installed on server.
Revert "Document `authbind` support"

This reverts commit fbcb3f20eaf04f604c4d7596edacc2531cdbc1d3.