Losslessly compress PNG images.
cosmetics
Modernizr is licensed under MIT license
.gitignore: sort entries by name
update jquery.mousewheel to v3.1.3
update spin.js to v1.3.0
Update html5 boilerplate to the latest git.
update json2 to the latest git (2013-05-26)
Update markdown-js to 9c21acdf08fb20a7ec1faa842a5092ec7dedaf8c.
update Underscore.js to v1.5.1
Update package.json.

* add fQuery as a devDependency
* add bugs property
* specify minimum node.js version
Update jquery.filedrop to the latest git.
Update README.md.

* specify the code language used
* Github uses https