buildpacks/nodejs: Remove duplicated code
builder: Reload ~/.bashrc after building
cli: Timestamp / tag images built
addons: Scaffold script for configuring addons on containers
addons/postgresql: Configure and autostart server

Closes GH-23
baseimage: ADD addons
addons: Improved output
baseimage: Install htop to ease debugging of container processes
baseimage: Bring back .deb caching for apt so we can properly cache them on the host machine during builds
cli: Load configs from .devsteprc everywhere
cli: Implement pristine command

Closes GH-19
cli: Distinguish cli output from image build output

Closes GH-17
cli: Implement clean command
addons: Add redis

Closes GH-25
addocs/postgresql: Many tweaks to make it work nicely and improved output
addons: Check if at least one addon was provided and improve validation logic
buildpacks: Add phantomjs

Closes GH-21
addons: Add memcached

Closes GH-24
baseimage: Sort init scripts
addons: Pass in project and cache root when configuring addons