added option extraneous_args

[TheTollingBell]

I was annoyed at the inability to integrate cargo fmt as a bacon task easily alongside --all-features so I added an option extraneous_args which enables and disables functionality for modifying arguments in a Job during its conversion to a Command.

[Canop]

You mean that what you needed was a way for a job to ignore the arguments given at launch ?

[TheTollingBell]

Yes, I just wanted a way to run non-cargo tasks every once and a while on a bind.