Updates site branding for smc-connect

Updates site branding to include new logo and related design tweaks as
a consequence of the introduction of the logo.
Updates marker paths in CSS

Updates path to google map markers in CSS. The paths were outdated,
causing the tests to fail.
Style adjustments

- Makes HSA logo smaller
- Adjusts header links (removes underline, adjusts padding)
- Adds width/height/alt to has logo
Merge pull request #314 from codeforamerica/branding

Branding
Merge branch 'master' into remove-loading-manager