npm_install, sleep, clean order, tweaks

I was having issues with getting this to work and finally tracked it down to the `copy` task, which couldn't find any files to copy -- even though they appeared to be there. It seems we need a delay after the untar step (200ms does the trick), and all is well.

While I was at it, I removed what was in the `bundle/` folder and took the approach of emptying it after use so that after grunt runs, it's empty. This keeps things cleaner. Also, removed `node_modules` from the repo -- users should instead do `npm_install` at install time.

Docs were updated to reflect this (I also added a Contributors section to throw my name in there!)

Also added a small visual tweak to the example to show the collection in a UL LI.