Update ansible playbook

Use new trusted.gpg.d keyring for apt key, improve idempotency,
only update cache when necessary, only restart service when necessary.

- Move "Is it working?" section to after "Install"
- Adjust "Is it working?" a bit, mention "systemctl status"
- Wording
- Add Troubleshooting section with journal cleanup tips

Merge pull request #156 from smu/master

fix #135

preparing new version

daily hit in the same time as logrotate.

* Add quotes and support path with spaces
* Using findmnt instead of mount | grep
findmnt is part of util-linux and should be available on almost all systems

Typo fixed

Merge pull request #117 from HorlogeSkynet/feature/systemd_timer

Co-authored-by: emwe1 <emwe1@users.noreply.github.com>

> Closes #84
> Closes #77

Merge pull request #111 from organic-ip/master

fix #108

fix #99

feature for #96

Make log2ram shutdown after journald has shutdown

Yeah !

start service before syslog-ng service too

prevent conflicts and failed startup of the syslog-ng daemon
if it's been used instead of the default rsyslog.

fix for #92 , bad fuzzy parameter

typo #82, improvement #81

#83 At system shutdown log2ram should wait until journald has shutdown before syncing back to disk, otherwise it will sync an unclosed journal log.

Zram implementation