Fingerprints for Cables and Tables

-constructing tables will leave fingerprints
-snipping cables will leave fingerprints
Ah, sorry. I had it written in the commit description but forgot to update the PR desc. 

Basically, there's a bug with the AI being able to use shortcuts to interact with the device while it's unpowered. I also added prints

Sent from my iPhone

> On Aug 18, 2014, at 1:09 AM, "Alex" <notifications@github.com> wrote:
> 
> In code/_onclick/ai.dm:
> 
> >  
> >  /obj/machinery/turretid/AICtrlClick() //turns off/on Turrets
> > +	if(!interact_offline && stat & (NOPOWER|BROKEN))
> Could you explain these changes.
> 
> —
> Reply to this email directly or view it on GitHub.