Add block.timestamp to log and events

[3esmit]

I think that would be useful for my tests.

So before Sandbox Event could be concatenated the time: [block.timestamp] Sandbox Event
Maybe disableable by config.

I know I could edit all my events and include block.timestamp, but that's not handy.

[romanman]

@3esmit : what is the rational to include block.timestamp into that log

[3esmit]

It's useful for debugging when I relay on timestamp in my contract. Without this I need to take note time I deployed, time I called certain function. This way would be easier to check timing functions.

[romanman]

@3esmit yeah, but you know I can think about 10-15 more options to trace there, don't you think it can be over burden on the log output logic