Systemd service improvements. (chestm007#17)

- Change to a system instead of a user service. In the general case (single user machine) we want this service to run from boot to shutdown, not only on user session. Using a user service forces users to enable lingering to achieve that. This change also removes the need for specific udev rules / plugdev group.
 - Enable more hardening options.
 - Add support for optional /etc/default/linux-thermaltake-rgb file (can contain DEBUG=true).
 - Add delay between restarts.
 - Change back executable path to the default /usr/bin. It is downstream packagers job to adapt the service file if they don't deploy to the standard location.

Signed-off-by: Julien Nicoulaud <julien.nicoulaud@gmail.com>

update udev rule

i really should have done this in a branch

let system determine path to binary

This is likely a bit hacky, but i see no other options with systemd

let system determine path to binary

This is likely a bit hacky, but i see no other options with systemd

additional testing - moar confidence

floats dont make great indexes in a list, leaving the debug logging i…

… used in also for future use

im legit retarded

and now lets actually use it...

lets actually read the temperature....

tring representation of curve fan model