upgrade to Play 2.2.3
get latest Tortoise

which runs Flocking, AIDS, etc.
Add emacs backup files to gitignore
Add support for hidden turtles and links. Fixes #134
Add Widget Generation!
Refactoring widget => JS converters
Minor tune-up
More minor tune-ups
Fixing bug from my refactoring
Making Tortoise sliders return numbers
Fix speed slider so that models can go one tick at a time.
Fix widget queries and netlogo-display attribute
Only create view if it doesn't already exist
Small changes for code review