Provide verbose logging

[asimpleidea]

Verbosity will be requested with --verbose leaving --debug just for debugging.

Probably will be included with #24

[ljakab]

What will be the difference between the two?

[asimpleidea]

What will be the difference between the two?

After some test and implementations I decided to only keep --verbose. --debug should be about stuff useful for debugging, i.e. dump a variable to stdout so that you could see that.

Anyways, I decided to drop --debug because it made no sense to support something little like that. I have partly implemented this in an experimental branch and will come in future commits once I am convinced about the implementation.

[ljakab]

In many places they are used interchangeably and mean the same things, other distinguish the two. I agree that for our use case we don't need two different options, --verbose sounds good.