Enable saving graph to file
Rename snap.html to edgy.html
Automatically set new graphs visible
Add 'shortening' example
Fix graphs on other sprites not being properly created
Autoload tools on startup
Use a manifest of examples instead of directory listing

Directory listings aren't guaranteed to exist (e.g. GitHub Pages).
Merge pull request #53 from Muon/master

Save graph to file, rename to edgy.html, shortening example.