The "clean" Grunt task doesn't work on Windows

[jeffpar]

The "clean" task, which deletes all the index.html files created by the bundled web server, uses a Bash script and *nix commands that don't work out of the box on Windows.

Workaround: don't run "grunt clean" from the command-line on Windows.

P.S. A similar issue exists for the "zipify-demo" task, which uses a Bash script and "zip" command-line utility that doesn't exist by default on Windows. Again, not super-critical.

[jeffpar]

I don't care about Grunt anymore. I use Gulp instead.