Merge pull request #35 from Solomon/add_legend

Add legend
Fixing #61
fixing violent crime rate, fixes #57
Removing median family income, fixes #56
Fixing child care center naming issue, fixes #59
Clearing data where N<30, fixes #54
additional update
Fixing hispanic data over 18, fixes #66
Poked around the Google Maps API and fixed #50
Click to highlight and show neighborhood information in sidebar. Commented out code that attempts to zoom to neighborhood but it's not working properly
Removing three geos — Observatory, Anacostia River and National Mall.
Populating sidebar with n/a if the value doesn't exist
Removing rock creek park
Merge branch 'master' of github.com:nickmcclellan/dcaction into gh-pages
fixing mixed active content issue
attempting a legend fix
attempting another fix
updating single mother families, closes #69
Correctly recalculating child care center ratios, closes #68
adding source dummy to data folder