Optionally show namespaces of candidates in popup menu

[jeffwkm]

This matches the menu from the cider company-mode backend. screenshot

[bbatsov]

Why is everything a v? In company you'd get things like f (function), m (macro) and so on.

Otherwise the change looks useful to me.

[bbatsov]

I'd also mention this change in the readme.

[alexander-yakushev]

@bbatsov:

Why is everything a v? In company you'd get things like f (function), m (macro) and so on.

Because of AC's stupid system that only allows different one-letter tags if they come from different completion sources. In other words, to get n, f, and v AC has to query the completion backend three times.

[bbatsov]

Well, that sucks. Luckily I'm a happy company user. :-)

[alexander-yakushev]

After using company-mode for a few months now I'd say that it has its sucky moments as well :).

[alexander-yakushev]

Great, thanks! Just splice everything into a single commit and we're good to merge :).

[jeffwkm]

Okay, done.