Sidebar navigation

Sidebar added for desktop/tablet sizes
Sidebar restructure

- Sidebar added (Includes HTML structure tweaks)
- "Recent Posts" included in sidebar
- RWD styling for new sidebar
Sidebar & tweets
Sidebar with Recent Tweets. Styling

- Sidebar (header and footer
- CSS for sidebar (inc. RWD)
- Twitter OAuth files for later use
Sidebar

- Sidebar structure and styling
- Twitter OAuth / stream files for future use