- added demo HTML: ripped dropzoneJS.com website front page and cleaned out all the social media cruft. Now the demo works off-net.

- regenerated the dropzone distribution files using coffeescript + Grunt

- included PHP server-side upload handling script (taken from the BigUpload github project, minimally tweaked -- I want to merge BigUpload and dropzone functionality later on anyway)

- made dropzone default area a tad smaller (Stylus/CSS tweak)

- added files upload directory structure to match the demo (+ BigUpload.php) and have it work out of the box