Add mapzen logo.
Merge pull request #159 from codeforamerica/add-zen

Add mapzen logo
WIP
Handle overnight times & a for am
Cleanup structure of servicewindow defaults.
WIP
Add speed, layover, and hourlyCost as top-level settings.
Add an apply-to-all button, and hookup events.
Round of styling.
Add weekdaysPerYear, saturdaysPerYear, and sundaysPerYear.
WIP
WIP
Migration
Styling.