add alpine_3.10 CI build

add debian_stretch and archlinux_latest CI builds

delint. addl CI builds. dcb v0.0.16

delint take 3

migrate to travis. add build badge. up to dcb v0.0.14. scope variables

to the role.

fix for blockinfile. added docs.

Merge pull request andrewrothstein#1 from spk83/master

Adding support for Darwin based OS required making privilege escalation a function of platform. On OS X we use Homebrew which doesn't work as the root user. Gotta be installed as the ansible_user with Homebrew.

added become hoohah

more sensible defaults

more secure defaults. less useful inside of a container.