Merge pull request #84 from NetLogo/sortable-lists

Sortable lists
State Machine Example crosses finish line

plus get newer version of Sandpile from models repo that
uses fewer workarounds (since tasks work now)
update model dumps
speed up TestModels by diminishing problem sizes

smaller worlds, shorter runs
Creating a handy, dandy 'jsengine' package
Introducing Benchmarker 1.0
Adding version number of JS engine to benchmark

It just makes sense to include version numbers of external libraries
into the benchmarks, since changing version numbers can change speed.
Minor package-pushing (refactoring)
Pumping up the private sector
Adding SpiderMonkey support