Extend the bb tool so that the various command packages use Stdin, out, and err from command
Extend the bb tool so that the various command packages use Stdin, out, and err from command

This is getting increasingly unwieldy. We'll take one more pass with fmt.Printf
and then probably call it a day for the "goroutine fork" and just start forking for
real. At some point it's unlikely we'll catch each and every possible thing that might change
for each "process", and it is more likely that we should just fork and call it a day.

Signed-off-by: Ronald G. Minnich <f569d0af9a3481c4007b95c7180d6c41009f2513@gmail.com>

rminnich/u-root,hugelgupf/u-root,hugelgupf/u-root,u-root/u-root,rminnich/u-root,hugelgupf/u-root,hugelgupf/u-root,u-root/u-root,rminnich/u-root,GanShun/u-root,u-root/u-root,rminnich/u-root,GanShun/u-root,GanShun/u-root