[Portland] Install directory as a sub-menu

[Nathan Kidd]

wwp wrote:
> One point still unclear, keeping in mind that my concern is the
> location of my app directory in the system menu: is that the
> application .desktop file that should have the Categories key, or
> the .directory file?

Sorry, I've not used app-specific directories.  The general paradigm for 
the linux desktop is to use category-specific directories.

I'm sure if you dig around the specs some more you'll find the answer.

-Nathan