NetLogo/Tortoise — pull request #52 by SethTisue (2013-12-06 00:20:37+00:00)
Title: use latest NetLogoHeadless

and make some compiler changes necessary to keep up with
NetLogo/NetLogo@cb9b477619396dd71e7d4fd962521c176123fd8f
(SeqProxy elimination in AST classes)

merge by @FrankDuncan