Remove "chrome=1" and add "initial-scale".

Missed it in the html5 boilerplate update.
Add async=true for twitter script.
Switch to vanilla google analytics code.
Minify font-awesome-ie7.css too.
Add alt to img tags.
Change "Node" and "Nodejs" to "Node.js".
Use the protocol relative url for plusone.js.
Update README.md.

Break long lines, change "Nodejs" to "Node.js" and use bold instead of underline to emphasize text.
Specify the favicon in html.
Github is using https so use that.
Update dependencies.
Disable uglify's `compress: true` option for now.

It is on by default, but when explicitly specifying it along with `report: min`, the warnings are shown.
Gruntfile.js: remove unneeded jshint option.
Use one apple touch icon (based on html5 bp 4.3.0)