Auto-Download an Update

The update feature should:

1. Download the latest version to CACHE folder
2. Unzip
3. Generate a shell script om CACHE folder
4. Exit

Shell script should:

1. Delete current version
2. Copy latest version from CACHE to same folder
3. Run latest, and exit

Detect current path using:

    System.AppDomain.CurrentDomain.BaseDirectory  

    // or
  
    System.IO.Path.GetDirectoryName(
      System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName)