Updating to latest version of NetLogo Headless
Why, destructively sorting, of course!
Making special agentsets dump out correctly
Minor code cleanup
Implementing link comparison like JVM NetLogo does

Initially, I scoffed at this and refused to do it, but I've finally
caved.  Yeah, it's crazy to me to sort links based on when their breed
was declared, but some tests count on this, so....
Allowing breeds to signal directedness
Implementing link breeds
Updating model dumps