grunt --help output not so helpful

[boneskull]

when you have a lot of aliases and groups, the huge list of tasks reported by grunt --help is overwhelming and difficult to understand.

It'd be cool if gtx could intercept this option, and render something a bit different for the task list, which is "grouped by" the groups. don't know if this is feasible.

[Bartvds]

I don't thing we can overwrite, it'd have it be solved creatively.