Logging

[Dragorn421]

Making several log files, one for all ERRORS and up, one all INFOS and up, and so on with DEBUG and TRACE, may be a good idea

Errors seem harder to look at or parse for end users if they are drowned in messages (understandable)

Also all INFO+ messages should be as user friendly as possible. If debug information should be put into them, just don't, and print it alongside at debug level