Implement logging of internal operations

[tebe-nigrelli]

It is necessary to be able to trace the program's operations to attribute errors to specific patterns in use.

1. Research GO logging strategy with the default library
2. Implement error / operations logging to file, so errors can be traced.

Come up with a common policy for when and how to write log entries

[tebe-nigrelli]

Logging policy should be based on turning points in the internal program's operation

[tebe-nigrelli]

Reminder to add checks that the Logger structs are non-nil before logging, otherwise when running tests it will cause segfaults