make git-lfs optional

add gentoo_latest support

alpine_3.12 and ubi8_8.2 CI builds

2 CIs per distro

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.