Add a portal to Stone Gauntlet

[ltlukoziuz]

I was soloing that place as an archer (which meant lots and lots of running around), and eventually managed to clear that place and take the Jarl's head. However, unlike in other dungeons, I found no portal to take me back up, and I was suddenly faced with the prospect of refighting every single enemy on my way back out of there (because they respawned by the time I finished Jarl's floor, or as I did, burning every single Haste/Retreat slot and getting the hell out of there.

Could we have a portal there?