Merge pull request #28 from jsuchome/master

check for nil value
Merge pull request #29 from jsuchome/master

- do not call systemctl during installation (bnc#861571)
remove support for KBD_SCRLOCK KBD_CAPSLOCK KBD_TTY
agent for /etc/vconsole.conf
- move keyboard sysconfig data to /etc/vconsole.conf (bnc#861819)
- 3.1.3
check for non empty
Merge pull request #30 from jsuchome/vconsole

support for /etc/vconsole.conf
- only KEYMAP belongs to /etc/vconsole.conf (bnc#861819)