Log to stdout in colors

Resolves #461

- Added `StandardOutWriter` that implements change-color-write-change-back-color helper functions
- `StandardOutLogger` and `DefaultLogger` logs in color, se #461 for an example.
- Updated Release_Notes (I think we should do that directly when we introduce or change things that's important to know)

`StandardOutLogger.UseColors = false;` turns it off.
Colors can be customized using: `StandardOutLogger.DebugColor = ConsoleColor.Green;`