Initial functionality

This branch provides templates and functions to produce the theme's fundamental structure and markup. Features include:

* Clean, semantic HTML5 markup, drawing on the HTML5 Boilerplate for best practice support across modern browsers and devices.
* Modernizr to provide HTML5 and CSS3 feature detection and support progressive enhancement.
* The Genericons icon font to support icons attached to key markup elements.
* Hybrid Core framework (2.0.0-alpha3) to add some powerful extensions and modified WordPress template functionality.
* A primary menu built into the page header and widget area following the main content area.
* An excerpt-based approach to all templates that list multiple posts, pages or other content types.

There is no styling, but once this is merged into the master a new branch could begin styling the theme. There are no customised templates for the different post formats included in this branch and plenty of other functionality that can be added. But this branch will give the underlying structure that can be used to develop branches with more advanced functionality.

Let's get this started.