updates from andrew:
- add new map image (not big enough yet)
- add background to header, make header logo smaller
- include logo in intro overlay, change font styling a bit
- change font styling in <h2>, match slideshow styles
- center paragraphs, make a little smaller
- clean up maps in background, make all same pattern and match colors
- improve icons in footer, coloring, size, position, hover state
- work on hover state for links, black on hover with yellow underline