Various changes.

Various changes, including:

* Add Sass configuation file.
* Convert CSS stylesheets to Sass SCSS stylesheets.
* Add images from the MiniCard WordPress theme.
* Modify SCSS stylesheets to use the images from MiniCard.
* Modify `default` Jekyll layout HTML to use the new stylesheets.
Vertically center the elements in the header.
Add the footer text to the config file.
Update stylesheet to use normalize.css.

See http://git.io/normalize for more information on normailize.css.
Add Infinise Go! as a submodule.
Add "Blog" page.

Also, update "Home" page.
Refactor CSS for better clarity.

Rename #content to .post and rename #content_wrapper to #content.
Separate the layout CSS from the styling CSS.
Change colour of the current page navigation link.
Add "Contact" page.