[PATCH phases] phases: ``hg phase`` command informs of phase movement

[Pierre-Yves David]

>> +            else:
>> +                ui.status(_('No phase movement\n'))
> 
> And this might want to be a warning.
> 
> You really love uppercase, don't you?
> 
> This should probably return 1.

hg push does return 0 when there is nothing to push. I kept the same logic here.

-- 
Pierre-Yves David