HTML5 the blank default project

So I wanted to make a change to the paypal module, but figured I'd start by writing a demo from the blank template for 2.6, but then I noticed the template wasn't HTML5, so I figured I'd correct that at source in this repository, but then I noticed the date in the footer was wrong, and thought OK, I'll just fix that too, but in setting that up, I noticed the template didn't render correctly in Chrome... and now we have this PR and a lot of yak hair over the floor.

In summary:

* Sorry. Lots of white space change.  I can re-apply these changes, and fix indentation/trailing space after if we want.
* Made index and default template HTML5 valid (checked output against http://validator.w3.org/check)
* Removed setting of HTML5 in `Boot`, as that's now the default.
* Fixed copyright footer for 2014.
* Removed the blank description and keywords meta tags.
* Switched to using `data-lift` and `data-lift-content-id` (from class).
* Weird rendering on Chrome, fixed by changing the content span from 17 to 16 - not clear to me why that would be required for Chrome/Mac version 36.0.1985.143.  Wasn't a problem in Firefox.  It was looking like this in Chrome before the change:

![app home 2014-08-18 15-21-35](https://cloud.githubusercontent.com/assets/102661/3952979/9ccd57c2-26e7-11e4-9bbc-7e2320116ec9.png)