Fixes geerlingguy#11: Use mas for Mac App Store automation.

Issue geerlingguy#25 Follow-up: Fix path to config.yml.

Fixes geerlingguy#25: Make it easier to override configuration/vars.

Make play run on only 127.0.0.1, not 'localhost' also.

Updated instructions for ansible-playbook command.

Switch to git protocol for dotfiles repo.

Fixes geerlingguy#9: Install required roles in current directory.

Fixes geerlingguy#5: Add /etc/sudoers configuration for more Vagrant …

…convenience.

Added Docker to configuration.

Add MacVim to cask apps, and remove unavailable tap.