Merge pull request #1 from amtamayo/map_work

legend & minor mods
added fixes for handling null values on charts, helper methods for utilization, added isat url link
Merge branch 'master' of github.com:amtamayo/ida-red
added isat averages, updated copy
Merge branch 'master' of https://github.com/amtamayo/ida-red
merging before heroku deploy
editing about page copy
adding schools.csv
lots of styles, charts, some copy
minor edits to mobility chart
Merge branch 'master' of github.com:amtamayo/ida-red
enabled disqus, fixed include on ga-event tracker