[dev] Where to put migrations?

[Chuck Hagenbuch]

Quoting Jan Schneider <jan at horde.org>:

> Where should migration scripts be stored when installing the  
> packages? At the moment they are installed on the top level, because  
> we don't use a hierarchy in the migrations/ directories yet, and  
> they are installed with the php role.
> The scripts role doesn't make sense either because these aren't  
> standalone scripts.
>
> We could either create a new file role, and then decide where to put  
> them. Or we could simply move them into the main tree in /Migration  
> directories, because they are just classes.

Isn't there a data role? If not, I think creating a migration or data  
role makes sense.

-chuck