* Revive fixes regarding following set of rules:
[rule.if-return]
[rule.increment-decrement]
[rule.var-declaration]
[rule.package-comments]
[rule.receiver-naming]
[rule.unexported-return]
in this commit:
- centralize logging output handler.
- set global Info/Debug/Error log levels based on config file or flags.
- remove per-plugin debug arg handling.
- add a I!, D!, or E! to every log message.
- add configuration option to specify where to send logs.
closes#1786
Paweł Żak
Steven Soroka
Daniel Nelson
Jan Willem Janssen
G-Research
DanKans
Patrick Hemmer
Cameron Sparr