Change About page layout and design.

- Update About page layout to Gridism.
- Use newer self picture.
- Remove unneeded css selector.
Fix minor issues with layout and spacing.

There were a lot of small issues with the layout for the
entire site. The following describes all the small changes
that were made to clean up the layout / design.

- Ensure Gridism is used throughout the entire site.
- Remove unique wrapper element and replace with gridism class.
- Remove float from all site specific elements.
- Unhide the social icons nav from the mobile view.
- Update year to 2014.
- Use no-gutters on all grids to keep out the padding.
- Change About from using thirds to quarters.
- Fix spacing by removing margins where applicable.
- Float the datetime on index view to the right (same line).
Remove the tags plugin and corresponding views.

- Remove the custom plugin.
- Remove the views associated with the tags plugin.
- Remove all stylesheet references.
- Remove the tags processing in the post metadata.
- Remove the tags config options.
Add Google Analytics to the site.