Update README.markdown.
Remove unit from zero.
index.html: add image dimensions for donate.png.
index.html: tweak twitter script.

Add async for old FF and use https.
index.html: Load jquery from Google's cdn and if that fails load the local fallback.
index.html: Github uses https.
Demo page: make logo margin-bottom a little bigger.
Save a few bytes from the demo images.
Add uglify-js in the build script.
Add uglify-js in the build script.
Move .jshintrc to package.json.

Also add jquery:true.

Requires JSHint 2.1.9.
Update .gitignore.