Improve rendering speed

See h5bp/html5-boilerplate#1874

Merge remote-tracking branch 'refs/remotes/origin/v4'

Merge pull request #85 from pra85/2016

Update year range to 2016

Merge remote-tracking branch 'origin/v4'

Merge remote-tracking branch 'origin/v4'

Merge remote-tracking branch 'origin/v4'

Missed version numbers

Merge remote-tracking branch 'origin/v4'

Update _alerts.scss

Merge remote-tracking branch 'origin/v3'

Conflicts:
	bower.json
	package.json