Tortoise: clean up a test

because I want to use it in a slide
latest models
Add tests round 1!
Change tests to fail correctly
Add breeds phase 1: is-breed? and create-breed

Had to also add in some extras like world.getTurtle(id) and whatnot
Add case for orderedturtles!
Add set-default-shape.

This also has a complete reworking of the underlying breed
representation threaded through it.  I couldn't extricate it into a
separate commit.
Add hatch.

It has a breed too!
Add <breed>-here.
Add Sheep Wolf!

Of course it deviates when you go more than one step!
Make turtle.toString use breed name!
Add breeds phase 1: is-breed? and create-breed

Had to also add in some extras like world.getTurtle(id) and whatnot
Add case for orderedturtles!
Add set-default-shape.

This also has a complete reworking of the underlying breed
representation threaded through it.  I couldn't extricate it into a
separate commit.
Tortoise: Wolf Sheep Predation needs fewer workarounds now
Tortoise: Wolf-Sheep Predation: predation now works
Fix typo
Merge branch 'tortoise-breeds' of github.com:NetLogo/NetLogo into tortoise-breeds