non blocking output reader

[DasBabyPixel]

Motivation

Logging had some issues with blocking when a full line wasn't written in output.

Modification

Fixed those issues by implementing a custom readLine() which calls ready() before every read()

Result

Logging works with the new system (and very little delay, which is very nice, as opposed to 1 second polling alternative)

Other context

@0utplay or @GiantTreeLP please review this derklaro is fed up with this problem
Still based on the old logging to better highlight modifications. This is the reason why this is a conflict
As soon as this is reviewed I can rebase/merge and revert the revered new logging system to make this mergeable

[0utplay]

Does this catch jvm crashes?

[DasBabyPixel]

Does this catch jvm crashes?

Catches invalid jvm arguments

Also catches everything in a shutdown hook

(Used FileDescriptor, because logging frameworks don't print everything to console, probably some issue with async logging on shutdown)