concurrent-output-1.10.17: Ungarble output from several threads or commands

Lets multiple threads and external processes concurrently output to the console, without it getting all garbled up.

Built on top of that is a way of defining multiple output regions, which are automatically laid out on the screen and can be individually updated by concurrent threads. Can be used for progress displays etc.

Modules

System
Submodules
- Console
  Submodules
  - System.Console.Concurrent
    
    Submodules
    
    System.Console.Concurrent.Internal
  - System.Console.Regions
- Process
  Submodules
  - System.Process.Concurrent