[support] moving contributed modules to /sites/all

[sander-martijn]

i've had success with that method as well.

Jason Flatt wrote:
> While Earnie's 'best practice' is probably the safer more sane way of doing 
> it, I will say that I have been successful on my development system by simply 
> moving the modules and then going to the modules page to refresh the system 
> table. That doesn't mean there won't be a module or two that won't comply. 
> Simply moving the modules and then expecting things to work correctly isn't 
> enough.
>