Optimize tool to work on phones or older browsers like IE11

[ruckeralex]

Optimize tool (http://water.openoakland.org/) to work on phones or older browsers like IE11

[Aaron Hans]

Some things that need to be done:

• transpile js so functionality works everywhere
• add media queries/redesign so display works on small screens
• might want to exclude some of the heavy dataviz (the CA chloropleth on homepage is currently pulling in a 9MB dataset, wonder if we can slim that file down by making the geojson less exact