Changes I made

http://pacecalc.azurewebsites.net/
* Id's cannot start with a number:
http://css-tricks.com/ids-cannot-start-with-a-number/
* Removed charset from html and css:
https://developers.google.com/speed/docs/best-practices/rendering#SpecifyCharsetEarly
* Changed external url's to start with // instead of http:// so will
work with no changes, if page changed to https://
* Changed jQuery reference to CDN:
http://developer.yahoo.com/performance/rules.html#cdn and
http://encosia.com/3-reasons-why-you-should-let-google-host-jquery-for-you/
* Upgraded jQuery to 1.9.1
* Using single quote in JS
* Using double quote in HTML
* No need to do a $.each over items, in this case:
$('.output-row').slideDown('slow');
* Enclosed js with anonymous function
* Enabled strict mode
* Passed through jslint and fixed errors: http://www.jslint.com/
* Enter key wasn't working (event wasn't defined)
* Changed hour/min/sec generation formula
* Changed functions to be absent jQuery and have initial values passed
in (functional programming)
* Changed submit to be from form submit (captured by jquery) so wouldn't
need each input box handler to check for enter
* Changed for loop to while with pop()