Add jekyll-assets plugin.
Various changes.

Various changes, including:

* Add Sass configuation file.
* Convert CSS stylesheets to Sass stylesheets.
* Add images from the MiniCard WordPress theme.
* Modify Sass stylesheets to use the images from MiniCard.
* Modify `default` Jekyll layout HTML to use the new Sass 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 normalize.css.
Add "Blog" page.

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

Rename #content to .post and rename #content_wrapper to #content.
Separate the layout from the styling.

Separate the layout-related sections of the stylesheet from the
styling-related section.
Change colour of the current page navigation link.
Add "Contact" page.
Remove the footer.
Add "Lorem Ipsum!" blog post.
Update "Welcome to Jekyll!" blog post.
Tweak the stylesheet.
Update "Blog" page.
Add icons.
Update navigation bar.

Update navigation bar to intelligently select the currently "active"
navigation link based on either the page URL or the page's categories.
Update "Projects" and "Blog" pages.
Tweak the layout and style.
Update "About" page.
Update "Home" page and add "Accounts" page.