Add option to disable/enable all verbosity options

It would be more convenient when you want to have a silent log -which most people want- without needing to replace all the 'true' by 'false'.

I think disabling all the messages should be the default (maybe keep the loading log?).

How about the following?

# ==========================================================================================
# LOGGING options
# For the individual actions below: the value 'true' enables logging and 'false' disables it.
# Setting the variable called 'none' to 'true' (thus: none=true) will disable *all* logging
# (thereby overriding all the other logging options).
# ==========================================================================================

none=true

cgroup_load=false
type_load=false
rule_load=false

apply_nice=false
apply_ioclass=false
apply_ionice=false
apply_sched=false
apply_oom_score_adj=false
apply_cgroup=false

check_disks_schedulers=false

# == End of logging options ==

In case some of you question where to change this: /etc/ananicy.d/ananicy.conf